Part 1, 1905] CRASSULACBAE 29 



1. Corynephyllum viride Rose, sp. nov. 



Stems 30^0 cm. high. Leaves closely set upon the branches, spreading almost at right 



angles to them, 3-5 cm. long, slightly glaucous. 



Collected by C. A. Purpus in eastern Mexico in 1904; flowered in Washington, D. C, March, 

 1905 (Rose wo. 952). 



11. CLEMENTSIA Rose, Bull. N. Y. Bot. Gard. 3 : 3. 1903. 



Perennial herb with an elongated rootstock, and usually with several stems from the 

 base. Stem-leaives numerous. Flowers in a more or less elongated dense spike or raceme. 

 Calyx-segments linear to linear-lanceolate. Petals distinct, rose-colored. Stamens 10, 5 

 alternating with the petals and distinct ; 5 opposite the petals and each adnate to its corre- 

 sponding petal near the middle. Scales 5, prominent, flat, obtuse. Carpels 5, erect. 



Type species, Sedum rhodanthum A. Gray. 



1. Clementsia rhodantha (A. Gray) Rose, Bull. N. Y. Bot. 



Gard. 3: 3. 1903. 



Sedum rhodanthum A. Gray, Am. Jour. Sci. II. 33 : 405. 1862. 



Glabrous; stems several or numerous from a thick rootstock, simple, stout, 1.5-3.5 dm. 

 tall. Leaves linear-oblong to oblanceolate, sessile, numerous, scattered, 1.5-3 cm. long, 

 entire or few-toothed, acutish or blunt ; raceme thyrsoid, usually longer than broad, very 

 dense, sometimes 6 cm. long; pedicels 1-3 mm. long; calyx-segments linear to linear-lan- 

 ceolate, acuminate, 4-6 mm. long ; petals rose-colored to white, linear-lanceolate, about twice 

 as long as the calyx; stamens nearly as long as the petals, adnate to them below the 

 middle ; follicles erect, their subulate tips slightly spreading. 



Type locality : High alpine region of the Rocky Mountains. 



Distribution : Meadows and along streams in the Rocky Mountains, Arizona and Utah to 

 Montana. 



12. VILLADIA Rose, Bull. N. Y. Bot. Gard. 3 : 3. 1903. 



Perennial by fleshy or somewhat tuberous roots; caulescent. Leaves terete and turgid. 

 Inflorescence an equilateral raceme, spike or very compact panicle. Flowers small. Sepals 

 5, nearly equal. Corolla not 5-angled, its segments thin, united into a short but distinct 

 tube. Stamens 10; anthers broad and short. Scales conspicuous, thin. Carpels erect; 

 styles very short. 



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Type species, Cotyledon parviflora Hemsl. 



1. V. im.bricaia. 



2. V. cucullata. 



Leaves closely imbricated. 

 Leaves often closely set but not imbricated. 

 Corolla-segments hooded. 

 Corolla-segments not hooded. 



Style wanting or indefinite. 3. V. Painteri. 



Style very definite. 



Corolla-segments pure white. 



Branches roughened. 4. V. Nelsoni. 



Branches not roughened. 



Leaves ovate-oblong. 5. V. alhiflora. 



Leaves linear. 



Corolla-segments 6 mm. long ; styles slender. 6. V. Pringlei. 



Corolla-segments 3 mm. long ; styles short. 7. V. stricta. 



Corolla-segments not pure white. 



Stems and leaves pubescent. 8. V. minutiflora. 



Stems and leaves not pubescent. 



Corolla-segments obtuse. 9. V. ramosissima. 



Corolla-segments acute. 



Scales greatly enlarged. 10. V. squamulosa. 



Scales not greatly enlarged. 11. V. parviflora. 



1. Villadia imbricata Rose, Bull. N. Y. Bot. Gard. 3 : 3. 1903. 



Cespitose ; sterile branches thickly set with small ovate imbricated leaves. Flowering 

 branches 2-6 cm. long, thickly set with imbricated leaves ; leaves oval, 3 mm. long, acute, 

 keeled on the back, at least in dry specimens, very pale, thickly set with minute tubercles ; 

 inflorescence a very short compact leafy spike ; sepals distinct, leaf-like, shorter than the 



