Paper Spine Cactus
Tephrocactus articulatus var. papyracanthus
tef-roh-KAK-tus ar-tik-oo-LAH-tus (ar-tik-yoo-LAH-tus) pap-i-ra-kan-thus
Synonyms of Tephrocactus articulatus (45) (Updated on 9-8-21 from Plants of the World Online): Cereus articulatus Pfeiff. , Cereus polymorphus C.F.Först., Cereus syringscanthus Pfeiff., Opuntia andicola Pfeiff., Opuntia andicola var. fulvispina Lem., Opuntia articulata (Pfeiff.) D.R.Hunt, Opuntia articulata Otto, Opuntia calva Lem., Opuntia diademata Lem., Opuntia diademata var. calva (Lem.) F.A.C.Weber ex K.Schum., Opuntia diademata var. inermis Speg., Opuntia diademata var. oligacantha Speg., Opuntia diademata var. polyacantha Speg., Opuntia glomerata var. calva (Lem.) G.D.Rowley, Opuntia glomerata var. inermis (Speg.) G.D.Rowley, Opuntia glomerata f. papyracantha (Phil.) Castell., Opuntia glomerata var. polycantha (Speg.) G.D.Rowley, Opuntia papyracantha Phil., Opuntia papyracantha K.Schum., Opuntia polymorpha Pfeiff., Opuntia strobiliformis A.Berger, Opuntia syringacantha (Pfeiff.) C.F.Först., Opuntia turpinii Lem., Opuntia turpinii var. polymorpha Salm-Dyck, Tephrocactus andicola (Pfeiff.) Lem., Tephrocactus articulatus var. calvus (Lem.) Backeb., Tephrocactus articulatus var. diadematus (Lem.) Backeb., Tephrocactus articulatus var. inermis (Speg.) Backeb., Tephrocactus articulatus var. oligacanthus (Speg.) Backeb., Tephrocactus articulatus var. papyracanthus (Phil.) Backeb., Tephrocactus articulatus f. papyracanthus (Phil.) Guiggi & Verloove, Tephrocactus articulatus var. polyacanthus (Speg.) Backeb., Tephrocactus articulatus f. syringacanthus (Pfeiff.) F.Ritter, Tephrocactus articulatus var. syringacanthus (Pfeiff.) Backeb., Tephrocactus calvus (Lem.) Lem., Tephrocactus diadematus (Lem.) Lem., Tephrocactus diadematus var. calvus (Lem.) Backeb., Tephrocactus glomeratus var. andicola (Pfeiff.) Backeb., Tephrocactus glomeratus var. fulvispinus (Lem.) Backeb., Tephrocactus glomeratus var. inermis Speg., Tephrocactus inermis (Speg.) Backeb., Tephrocactus neoglomeratus var. andicola (Pfeiff.) Y.Itô, Tephrocactus neoglomeratus var. fulvispinus (Lem.) Y.Itô, Tephrocactus strobiliformis (A.Berger) Backeb., Tephrocactus turpinii (Lem.) Lem.
Modern taxonomy seems to want to exclude subspecies, forms, and varieties as accepted names but I like to include them because the names distinguish plants from one another.
Tephrocactus articulatus (Pfeiff.) Backeb. is the accepted scientific name for this species. It was named and described as such by Carl Backeberg in Cactus (Paris) in 1953. It was first named Cereus articulatus by Louis (Ludwig) Karl George Pfeiffer and documented in Enumeratio Diagnostica Cactearum in 1837.
Tephrocactus articulatus var. papyracanthus (Phil.) Backeb. was first described by Carl Backeberg in the same publication as the species. It was first named and described as Opuntia papyracantha by Rudolph Amandus Philippi in Gartenflora in 1872. Plants of the World Online lists Tephrocactus articulatus var. papyracanthus as a synonym of the species. You can still use the name since it is validly published. 🙂
The genus, Tephrocactus Lem., was named and described by (Antoine) Charles Lemaire in Les Cactées Histoire in 1868.
Plants of the World Online by Kew still lists 10 accepted species of Tephrocactus (as of 9-8-21 when I last updated this page). It is a member of the plant family Cactaceae with 144 genera. Those numbers could change as updates are made on POWO.
THERE ARE A FEW LINKS AND GROWING RECOMMENDATIONS AT THE BOTTOM OF THE PAGE FOR FURTHER READING.
When I was at Wal-Mart buying cactus on February 9, 2016, a piece fell off of a Paper Spine Cactus. I just had to rescue it and bring it home. That is better than it being thrown in the trash, right? As you can see in the first photo, it didn’t take long for this little nubbin to start growing.
The Tehprocactus articulatus var. papyracanthus is native to Catamarca, Cordoba, La Rioja, Mendoza, Salta, San Luis, and Santiago del Estero in western Argentina. There isn’t much online about this cactus but is very easy to grow and very interesting for sure…
This cactus is very carefree and easy to grow. The species can be variable, some having spines and some do not. The one I have does have a few spines as well as tiny glochids that very hard to remove when they get in your fingers. These plants don’t get very tall because the segments are loosely attached and fall off easily then they take root and grow another plant. The feature of this variety is the papery spines rather than needles. They produce yellow or white flowers.
They like bright light and the stems will be thinner if not given enough. If the segments fall off, just stick the end in the soil and they will easily grow a new plant. In the wild, this allows them to grow large colonies.
I have had this cactus in this very small pot since I brought it home and decided it was time to put it in a larger pot on May 25.
I moved most of the potted plants to the front and back porch on July 4 after the Japanese Beetle invasion. I think all of the cactus are on the back porch in full sun except the Tephrocactus articulatus var. papyracanthus. It seems to burn very easily in too much sun although it likes bright light. GEEZ!
It does like its larger pot but I think it is looking for somewhere to drop a segment or two…
I had to move the potted plants inside for the winter on October 10 because the forecast was calling for an “F” in a few days and the nighttime temperatures were getting cooler. I usually measure the cactus and succulents when I bring them inside but I have never measured this plant.
November 29 was a nice spring-like day, so I took the cactus to the back porch for a photoshoot. I was working on a post to show the difference between the cactus in my collection.
The segments of this plant are loosely attached and fall off easily.
The areoles produce these strange ‘raffia-like” spines which is where the common name of this variety comes from. This plant has slightly raised tubercles but there is also a “tubercled type” of this variety whose tubercles are even more raised. These cactus areoles produce tiny glochids which differ from the wool in Mammillaria species. Glochids, which are also produced by Opuntia species (Prickly Pear) are a real pain to remove if you get them stuck in your fingers. Well, this species was once an Opuntia species…
I moved the potted plants back outside the first part of May as temperatures warmed up enough. I keep this Tephrocactus on the front porch with most of the succulents while most of the other cactus are on the back porch. I keep this cactus on the front porch because I don’t want the cats knocking the segments off… It seemed like it got sunburned before, too. They are supposed to do better in full sun and the base of the segments may be thicker so they don’t fall off as easily… Hmmm…
LOOKING GREAT on June 22, 2019!
I had to move the potted plants inside for the winter on October 10 because an “F” was in the forecast. I always take photos of all the plants when I move them inside and measure the cactus and some of the succulents. No point in measuring this cactus as sometimes the segments fall off… I was surprised some of the segments had gotten as tall as they are.
I had to bring the potted plants inside for the winter on October 15 because an “F” was in the forecast. As always, I tale photographs and measurements as I bring them inside. The Tephocactus articulatus var. papyracanthus did very well over the summer. I don’t measure this cactus when I bring it inside because of the way it grows. For grins, I did measure the tallest, umm, stem when I put these photos on this page. It is the one on the left and it was 3″ tall and the lowest and largest segment was about 1 1/2″ wide. You have to be careful when handling this species because it will fall apart easily (not to mention the tiny glochids will stick in your fingers). To think I started out with one small segment in 2016…
Well, the above photo didn’t come out that great but you can see the tubercles and the glochids fairly well…
I think the tops of cactus look pretty neat. This species has kind of purplish glow on some of the top segments. In the above photo, you can see some wool and glochids (tiny, fuzzy spines along with the papery spines. Very neat and unusual.
It has done very well over the summer of 2021 and has managed to get taller without falling apart. It kind of needs a bigger diameter pot but not a deeper pot. Those are hard to find…
Origin: Western Argentina
Zones: USDA Zones 8b-10b (15 to 35° F)
Size: 6-12” if you can keep the segments from falling off.
*Light: Sun to part shade
**Soil: Very well-draining. Good quality potting soil amended with pumice (50/50) or additional perlite and chicken grit (2-1-1).
***Water: Average during the growing period, sparsely if any during the winter.
*During the summer, I keep most of my cactus on the back deck where they receive full sun. During the winter most cactus aren’t picky about the light because they are basically dormant. For several winters, mine were in front of the east-facing sliding door in the dining room so they didn’t get much light but they did great. I built a new shelf for the bedroom so now they are in front of a west-facing window. Most of the succulents are on a shelf in a south-facing window in a cool bedroom but a few are in my bedroom.
**When it comes to potting soil, finding the “sweet spot” is not exactly that easy when materials are limited. Cactus and succulent enthusiasts (and experts) do not recommend using peat-based commercial mixes but what choice is there for most of us. They say to use a loam-based mix… Hmmm… Our soil is loam, so do I just use dirt? Well, no because “dirt” is heavy and you need a “light” material. There is A LOT of cactus and succulent recipes online and some get pretty elaborate. Many say to use sand as an ingredient, but if you do that, it needs to be very coarse, like builders sand, because “ordinary” sand, like for sandboxes, is too fine and it clogs up the air space between the coarser ingredients. For MANY years I used 2 parts Miracle Grow or Schultz Potting amended with an additional 1 part of perlite and 1 part chicken grit. Schultz doesn’t seem to have as many large pieces of bark. Cactus and succulent enthusiasts recommended using pumice instead of perlite and grit so I checked it out… The “guy” at General Pumice (online) recommended using a 50/50 mix of potting soil and pumice. General Pumice has 3 different sizes to choose from depending on the size of the pot. SO, in 2018 I bought a bag of 1/8″ and mixed it 50/50 with Miracle Grow Potting Soil. I liked it pretty well. Then in 2020, since most of the cactus were in larger pots, I ordered the 1/4″ size. Pumice has a lot of benefits over perlite and has nutrients that are added to the soil when watering. Pumice is also heavier so it stays mixed in the soil instead of “floating” to the top. Still, there is the issue of the mix getting very hard once you stop watering the plants during the winter when you stop watering. I think this is because of the peat in the potting soil… SO, instead of re-potting the cactus and succulents in the spring, I started doing it during the fall and winter so their soil would be loose. Since you don’t water as frequently during the winter if at all, the timed-release fertilizer does not activate. I have not tried coir, but I am looking into it…
I think a lot of growing tips online are written by people who never grew succulents and cactus. They just copy from one website and paste it to theirs. You have to sort of mimic the soil where species grow in their native habitat. For that, you almost have to go see for yourself… Typically, they grow in fairly rocky soil.
***I water my cactus and succulents on a regular basis during the summer but barely ever in the winter (maybe a little in January) until close to time to take them back outside.
When you bring your new plants home from the store, you need to check their roots and the soil to see if they are wet. If so, you may want to re-pot it right away. It is advisable to re-pot them in a better potting soil more suitable for cactus and succulents.
There isn’t much online about this cactus, but I will continue adding photos as time goes by and give as much information as I can from my experience. The Tephrocactus articulatus var. papyracanthus seems to be very easy to grow.
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