Origin and Habitat: It is known only from a small area around Hankey (Humansdorp), in the Eastern Cape Province where it grows together with Haworthia attenuataSN|15017]]SN|2012]], Haworthia gracilisSN|2012]]SN|15017]], Gasteria pulchraSN|655]]SN|655]] and Aloe humilisSN|626]]SN|626]]. Unfortunately the small area where these plants grows has been almost destroyed due to agricultural activity (The 5 miles strip along the road, where the population used to grow was cleaned by the bulldozer... and left unexploited).

• Haworthia attenuata var. radula (Jacq.) M.B.Bayer
• Aloe radula Jacq.
• Apicra radula (Jacq.) Willd.
• Catevala radula (Jacq.) Kuntze
• Haworthia pumila var. radula (Jacq.) Halda
• Haworthia radula (Jacq.) Haw.
• Haworthiopsis attenuata var. radula (Jacq.) G.D.Rowley

• Haworthia attenuata (Haw.) Haw.
• Aloe attenuata Haw.
• Aloe radula Ker Gawl. non Jacq.
• Apicra attenuata (Haw.) Willd.
• Catevala attenuata (Haw.) Kuntze
• Haworthia pumila subs. attenuata (Haw.) Halda
• Haworthiopsis attenuata (Haw.) G.D.Rowley
• Haworthia attenuata var. argyrostigma (Baker) A.Berger
• Haworthia argyrostigma Baker
• Haworthia attenuata var. britteniae (Poelln.) Poelln.
• Haworthia attenuata f. britteniae (Poelln.) M.B.Bayer
• Haworthia britteniae Poelln.
• Haworthia attenuata var. caespitosa (A.Berger) R.S.Farden
• Haworthia attenuata f. caespitosa (A.Berger) Pilbeam
• Haworthia fasciata var. caespitosa A.Berger
• Haworthia attenuata var. clariperla (Haw.) Baker
• Aloe attenuata var. clariperla (Haw.) Salm-Dyck
• Aloe clariperla (Haw.) Schult.f.
• Haworthia attenuata f. clariperla (Haw.) M.B.Bayer
• Haworthia clariperla Haw.
• Haworthia attenuata var. deltoidea R.S.Farden
• Haworthia attenuata var. inusitata R.S.Farden
• Haworthia attenuata var. linearis R.S.Farden
• Haworthia attenuata var. minissima R.S.Farden
• Haworthia attenuata var. odonoghueana R.S.Farden
• Haworthia attenuata var. uitewaaliana R.S.Farden
• Haworthia attenuata f. variegata
• Haworthia attenuata f. albovariegata hort.
• Haworthia tisleyi Baker
• Catevala tisleyi (Baker) Kuntze

• Haworthia attenuata var. radula (Jacq.) M.B.Bayer
• Aloe radula Jacq.
• Apicra radula (Jacq.) Willd.
• Catevala radula (Jacq.) Kuntze
• Haworthia pumila var. radula (Jacq.) Halda
• Haworthia radula (Jacq.) Haw.
• Haworthiopsis attenuata var. radula (Jacq.) G.D.Rowley
• Haworthia attenuata var. radula f. variegata hort.
• Haworthia radula f. variegata hort.
• Haworthia radula var. laevior Haw.
• Haworthia radula var. magniperlata Haw.
• Haworthia radula var. major (Salm-Dyck)
• Aloe radula var. major Salm-Dyck
• Haworthia radula var. minor (Salm-Dyck)
• Aloe radula var. minor Salm-Dyck
• Haworthia radula var. pluriperlata (Salm-Dyck) Haw.
• Haworthia rugosa (Salm-Dyck) Baker
• Aloe rugosa Salm-Dyck
• Catevala rugosa (Salm-Dyck) Kuntze
• Haworthia rugosa var. perviridis (Salm-Dyck) A.Berger
• Aloe rugosa var. perviridis Salm-Dyck
• Haworthia subulata (Salm-Dyck) Baker
• Aloe subulata Salm-Dyck
• Catevala subulata (Salm-Dyck) Kuntze

• Haworthia attenuata cv. Wide Zebra

Description: H. attenuata var. radula differentiates from Haworthia attenuataSN|2012]]SN|2012]] because of smaller and more numerous tubercles whereas H. attenuata has fewer and larger tubercles. Moreover the leaves are more scabrid rather than tuberculate. It has also more slender and longer leaves. The many tubercles give the plant a silvery appereance.
Stem: Acaulescent.
Rosette: Flatly close to the soil up to 15 cm in diameter, forming clumps.
Leaves: About 7,5-8 cm long and 2 cm wide at base, erect, radiating, attenuate (tapering), green to brownish, very densely covered all over with minute white tubercles on both sides which are pretty much of the same size.
Inflorescence: Sparsely branched, lax, 24-30 cm tall.
Flowers: White with reddish-brown veins, flower-tube obcapitate. Tepals revolute.
Blooming season: November-December.

Cultivation and Propagation: It is an easy plant that usually does not give many problems in cultivation. Needs light shade to filtered sun, but will redden with more light exposure. Regular water in summer, keep dryer in winter, needs good drainage It grows much better outdoors in spring and summer, it is also perfect for the bright windowsill. Grow it in light, fertile, well drained, moderate soils, with a slightly acidic pH (5-6). Avoid any frost.
Maintenance: Removal of old flower stalks; It is a suckering species, and one plant can eventually cover a large area. Divide the crowded clumps periodically. During the winter months, the plants should be grown cool to initiate flower development (about 5-10°C )
Propagation: Suckers, division of older plants.