178 Michel Gandoger: Eriogonum Polygonacearum genus speciebus. 
California merid, ad S. Bernardino (Parish, no. 2820). 
15. Eriogonum Thurberi Torr. y. acutangulum Gdgr., l. c., p. 198. 
Limbus f, orbiculatus planus, scapi acute angulosi conferte floriferi, 
involucrum laeve, peduneuli patuli. 
Virginia Mountains (Hillman). 
16. Eriogonum thymoides Benth. 8. pallens Gdgr., |. c., p. 198. 
Folia glabrata superne viridia longiora, flores albo-carnei vel 
pallide rosei. 
Oregon, ad Union (Cusick, no. 1880 park) 
17. Eriogonum umbellatum Torr. 
Sequenti modo formae disponi possunt. 
1. Folia superne glabra viridia. 
8- Crandallii Gdgr., 1. c., p. 198. 
Scapus floccosus, folia obovata, cymae breviter pedunculatae, flores. 
aurei 5 m longi. 
Colorado, ad Fort Collins, alt. 5—6000' (C. Crandall; J. Cowen). 
y. chrysanthum Gdgr., l. c., p. 198. 
Scapus laevis, folia ovata, cymae longe pedicellatae, flores aurei 
4 m longi. - 
Oregon, frequens in montosis. alt. 3—4000' (Cusick, no. 1733 sub 
nom. E. heracleoides var. minus). 
d nevadense Gdgr., |. c., p. 198. 
Scapus floccoso-tomentosus, folia obovato-spathulata, cymae breviter 
pedicellatae, flores ochroleuei 3!/, m longi longe pedunoculati. 
California, in Sierra Nevada ad Reno (Hillman). 
2. Folia undique incano-tomentosa. 
e. Cladophorum Gdgr., l. c., p. 198. 
Ramosissimum, caudiculi laxe foliosi elongati numerosi, folia sub- 
orbieulata, flores 4 m longi aurei. 
Yellowstone Park, ad Upper Geyser Basin (P. Rydberg and E. 
Bessey, no. 5330). 
- &. dichrocephalum Gdgr., ]. c., p. 199. 
Conferte ramosum, caudiculi dense foliosi breves, folia ovata utrinque 
acuta, flores 5 m longi ochroleuco-flavescentes cum macula rubida extus 
ad dorsum. 
Oregon, ad Top of Stein s Mountains (W. Cusick, no. 1965). 
3. californicum Gdgr., l. c., p. 199. 
Paree ramosum, caudieuli rari conferti foliosi, folia obovata dense 
lanata obtusa, flores 5 m longi ochroleuci. 
California, ad Leavine in Sierra Nevada (Hillman). 
18. Eriogonum vimineum Dougl. 
Conspicue varians: 
1. Flores intense purpurei vel rubri. 
8. rigescens Gdgr., l. c., p. 199. 
Scapi strieti inferne lanati, folia subtus dense lanuginosa superne 
