AND SUCCULENT JOURNAL (U.S.), Vol. 65 199 baldratii, C. sprengeri. The flower of Angolluma of the crater. The area has shallow soil overlying semitubiflora is intermediate between these ex­ lava, with very sparse low vegetation consisting tremes in having a distinct tube that is no longer of scattered shrubs and clumps of grass with much than the corona and gynostegium, which are vis­ bare soil and exposed lava. The sides and floor ible in the mouth of the tube. This situation is of the Ngorongoro Crater have a similar kind of also seen in A. decaisneana and vi- vegetation, but with a greater cover, presumably bratilis. Caralluma vibratilis also has a soboli- because of the lower grazing pressure in what is ferous growth habit, but the outer corona is more a conservation area. On the label for his speci­ deeply saccate. In A. decaisneana the outer co­ men, Bally noted that the ledge on which he found rona resembles that of the new species in being the was used as a vantage point by hyaena shallowly saccate, but the sides of the "sac" are and lion. fused with only the lower half of the inner corona (Fig. 5). The corolla of A. decaisneana has dark References red lobes that are flat, in contrast to the revolute lobes of the new species. Brummitt, R. K. 1992. families and Whilst examining some stapeliad material in genera. Royal Botanic Gardens, Kew. Kew Herbarium I came across the specimen Bal­ Bruyns, P. V., and P. I. Forster. 1991. Recircum- scription of the Stapelieae (Asclepiadaceae). Tax- ly S.76, labelled Caralluma subterranea Bruce & on 40:381-391. Bally, and I recognised this as identical with my Eggli, U., and N. P. Taylor. 1991. Repertorium plan- Kisite Crater collection. Presumably Bally's tarum succulentarum XLI (1990). I.O.S., Zurich. specimen was assigned to C. subterranea because Gilbert, M. G. 1978. The 'Ango Group' of Caralluma of the subterranean shoots. On the label, Bally in Ethiopia. Cact. Succ. Jour. Gt. Brit. 40:39-50. had stated: "Very luxuriant and much sturdier . 1988. The taxonomic position of the'Ango than elsewhere." Apart from being a more sturdy group' of Caralluma. I.O.S. Bull. 4:244-245. plant, A. semitubiflora also differs from C. sub­ . 1990. A review of Caralluma R. Br. and its terranea in the tubular corolla, the saccate outer segregates. Bradleya 8:1-32. Lavranos, J. J. 1984. A new species of corona, and absence of projections on the inner (Asclepiadaceae: Stapelieae) from the north east­ corona lobes. Material that I collected at the type ern Transvaal, Republic of South . Cact. Succ. locality of A. semitubiflora has bright yellow J. (U.S.) 56:196-197. flowers. On the label of his specimen from the Leach, L. C. 1978. A contribution towards a new Ngorongoro Crater, which is about 65 km south­ classification of Stapelieae {Asclepiadaceae) with west of Kisite Crater, Bally notes: "Maroon and a preliminary review of Haw. and descrip­ yellow varieties found in great numbers." As Bally tions of three new genera. Excelsa Taxonomic Se­ S. 76 is in spirit it has lost its colour, and so details ries No. 1. of the colour pattern on the maroon variant are Munster, R. 1990. Angolluma, a new genus. Part 1. not known. Cact. Succ. J. New South Wales 17:63-65. Plowes, D. C. H. 1990. An introduction to stapeliad Kisite Crater is a small extinct volcano in the genera. Cact. Succ. J. (U.S.) 62:111-129. Rift Valley of northern Tanzania. The type ma­ White, A., and B. L. Sloane. 1937. The Stapelieae, terial of Angolluma semitubiflora was found 2nd ed., 1:262-274. Abbey San Encino Press, Pas­ growing beneath a small shrub on the east rim adena.

A. L. SILER Marcus Eugene Jones was disdainful of Britton and Rose for erecting the monotypic genus Utahia for Echinocactus sileri Engelmann. The species was named for A. L. Siler, who sent a single plant to Dr. George Engelmann, Missouri Botanical Garden, in 1883. It remained a "lost" plant until after the publication of Britton and Rose's Cactaceae in the early 1920's. Wrote Jones in Contri­ butions to Western Botany, No. 16, 1930: "Living in Kanab, Utah, was an old farmer who became interested in Major Powell's survey of the Grand Canyon; Powell's headquarters were at Kanab. He figured that he might make some money out of collecting native and sending them east and to . He was A. L. Siler, a kindly and uneducated old man, a Mormon who had more than one wife. He was about 7 feet tall, and as slim as a rail, and wore about a No. 14 shoe. He was awkward and uncouth, but a sincere man. He had a ranch up on the plateau among the pinons and junipers at a place called Ranch, where I visited him in 1890. He specialized in cacti, and sent his stuff to Engelmann for naming. He explored the steep slopes of the Grand Canyon and got many interesting species. At Pipe Springs, Arizona, he found a cactus which Engelmann named Echino­ cactus sileri in his honor. Apparently but one specimen of it is extant and that a dried plant in the herbarium of the Missouri Botanical Garden from the type locality." Larry W. Mitich