COLLECTED ON THE MISSOURI, ETC. 263 
Has. Sunny rocks, Kooskooskie Valley. June. ». 355. 
l. Eriogonum alatum, Torr. in Frem. Rep.—var. B, elatum, Gey. MSS., 
non Dougl. 
Has. 8. On trap rocks, opposite the Red Butter, between Platte and 
Sweet-water Rivers, on banks of deep and ferruginous loam. Co- 
rolla yellow; rare. July. n. 145. 
This has quite the habit of Z. longifolium; and Mr. Bentham ob- 
serves that Mr. Nuttall’s specimens are much more woolly than Mr. 
Drummond's: but the leaves of the present plant are not woolly at all, 
simply downy and pilose with soft hairs, and of the same colour on 
both sides. If anew species, as is very probable (but my specimen is 
scarcely in flower), it may bear the name given to it by Mr. Geyer. 
2. Eriogonum flavum, Nutt. in Fras. Cat.—E. flavum et E. crassifo- 
lium, Benth. in Linn. Trans. v. 11. p. 408. 
Has. On calcareous rocks in the ** Black Hills," a range of mountains 
the Upper Platte and Sweet-water Rivers. July. Sometimes as 
many as thirty stems arise from the same root. x. 15. 
3. Eriogonum gnaphalodes, sp. n.; undique dense albo-lanatum, cauli- 
. bus brevibus laxe ramosis subczespitosis, foliis oblongis in petiolum 
longe angustatis, involucris ad apicem pedunculi simplicis subcapita- 
tis umbellatisve tubulosis 5-dentatis albo-lanatis, perigoniis minimis 
extus basi pilosis, laciniis interioribus sub anthesi minoribus ob- 
longis. Benth. 
Has. High calcareous cliffs, Upper Platte. Flowers brownish-yellow, 
very small. June. 2. 158. 
Caules basi sublignosi, ramis 3—4-pollicaribus foliatis, undique uti folia 
peduneuli et involucra lana densa molli nivea obtecti. Folia sub- 
pollicaria, petiolo pariter pollicari. Pedunculi 2—4-pollicares. 
Bractee sub capitulo v. umbella pauce, foliaceze, flores superantes. ——— 
Involucra 8-10, angusta, dentibus acutiusculis. Perigonia vix i e de 
longa. Benth. : ; 
4. Eriogonum stellatum, Benth.— Hook. Fl. Bor. Am. vol. ii. p. 135. T 
Has. Moist stony sunny slopes of ravines, in the high stony plains 
of Upper Sweet-water River, near W /ind-river Mountains. July. 
1. 241. Rather more woolly than the specimens originally de- 
scribed. uo 
5. Eriogonum umbellatum, Torr. in Ann. Lyc. Nat. Hist. vol. ii. p. 941. de 
—Hook. Fl. Bor. Am. vol. ii. p. 135. 
