OF ARTS AND SCIENCES: JANUARY 26, 1870. 177 



51. E. virgatum, Bentli. in DC. Caule gracili 1^-2 pedali aut 

 basi tantum aut superne parcius foliis ovatis oblongisve instructis, 

 ramis paucis plerumque simplicibus longe virgatis nunc paniculato- 

 raraosis ; involucris dissitis 2-2^ lin. longis, ore 5-dentato ; brac- 

 teolis vix barbellatis ; perigonio albo ; ovario et achenio abrupte ros- 

 trato superne saltern ad angulos birtello-scabris. — California, on tbe 

 plains, usually more northern than the preceding, Fremont, Bridges, 

 Wallace, Brewer, Bolander, &c. Embryo half a line long, with short 

 orbicular accumbent cotyledons. A luxuriant form collected by Bo- 

 lander, two or three feet high, with the numerous virgate branches here 

 and there leaf-bearing, passes into 



Var. roseum (E. roseum, Durand & Hilgard, in Jour. Acad. 

 Philad. 3, p. 45 (1854) & Pacif. R. R. 5, p. 14, t. 15) : caule ramoso 

 ad paniculam usque laxam foliato ; involucris in ramulis brevibus 

 paucis ; perigonio roseo. — Pose Creek, California, Dr. Heermann : 

 earlier published than E. virgatum. To this belongs E. verticillatum, 

 Nutt. PI. Gamb. 1. c, the earliest name, but most imperfectly charac- 

 terized from a specimen not yet in flower. 



++ ++ Involucra pauciflora vel subpluriflora, anguste tubulosa (haud 

 ultra lineas 2 longa), secus ramulos tenues paniculre diffusa? amplaa 

 dissita, perigoniis (glabris aut pilosis) etiam fructiferis longiora. 

 Bracteola? vix barbellatos. Plantar demissas (spithamea? ad peda- 

 lem), superne tenuiter tomentosae vel glabrae. 



52. E. dasyanthemum, n. sp. Lana tenui flocculosa cinereum 

 vel superne glabratum, inferne foliatum ; foliis subtus incano-lanatis 

 rotundatis in petiolum abrupte angustatis ; involucris pauci-plurifloris 

 breviter 5-dentatis ; perigonio extus saltern basi tenuiter villoso, 

 segmentis obovatis fere requalibus. (E. vimineum, var. eriocladon 

 Benth. in DC. ? Spec, in herb. Benth. & herb. Torr. haud reperta.) 

 — California : near Clear Lake, Bolander, Torrey ; also Borax Lake, 

 Torrey, a more glabrate form, both as to the panicle and involucre, 

 and the exterior of the flower, the pubescence of which in other speci- 

 mens is very conspicuous. Branches of the diffuse panicle less slender 

 and compound, and the flowers rather larger, than in E. vimineum ; 

 the involucre commonly hoary, and fully two lines long, sometimes 

 15 - 20-flowered. 



53. E. viMiNEDsr, Dougl. in Benth. Eriog. Foliis radicalibus rotun- 

 datis subtus incani- supra araneoso-lanatis ; involucris sparsis pauci- 



VOL. VIII. 23 



