158 PROCEEDINGS OF THE AMERICAN ACADEMY 



of Rocky Mountains, Nuttall. 4. Latifolium, nanum, umbella saepiu3 

 triradiata, radiis bi*evibus. E. ellipticnm /3. megacephalum, Nutt. 1. c. 

 Rocky Mountains, Nuttall. 5. Brevifolium, tomento tenui appressisi- 

 mo incanum ; caulibus simplicioribus multo minus foliatis ; perigoniis 

 extus tenuiter pubescentibus. California, Rev. Mr. Fitch, in herb. 

 Torr. Nevada, Stretch, S. Watson. 



* * Perigonium extus glaberrimurn, basi stipitiformi conspicua. 



•k- Tota planta glaberrima praeter filamenta basi villosa : ovarium 

 etiam glaberrimurn. Flores majores in involucro 7 - 8-fido per- 

 multi. 



13. E. Torreyanum, Gray, Mss. Spithamneum ad subpedalem; 

 foliis obovato-spathulatis crassiusculis fere aveniis plerisque in caudice 

 confertis ; caulibus floridis pedunculisve subvalidis inferne nudis vel 

 medio unifoliatis apice umbellam subsimplicem 3 - 4-radiatam vei'ticillo 

 foliorum subtensam gerentibus ; floribus aureis pro genere magnis (lin. 

 4-4^ longis), basi stipitiformi brevi ; embryonis rectiusculi cotyledoni- 

 bus orbiculatis radicular subrequilongis. — California, on a high mountain 

 of the Sierra Nevada near Donner's Pass, Torrey, no. 443. Rays of 

 the umbel from one to nearly two inches in length, subtended by a whorl 

 of leaves like the lower leaves but smaller, and sometimes accom- 

 panied by one or two solitary and naked short-pedicelled flowers ! The 

 lateral rays bear an involucriform whorl of smaller bracts towards their 

 summit, from which sometimes proceeds a short secondary ray. The 

 very numerous flowers form a globular head which in fruit is nearly 

 an. inch in diameter: the perigonium scarious-persistent, its segments 

 spatulate-obovate, equal, at the base with a strong costa running down 

 to the stipitiform portion, which is only half a line long. 



h— -i— Herbre lanata?, tomentosa? vel araneosas, saltern juniores et 

 pagina infera foliorum, nunc demum glabratre : filamenta inferne 

 villosa : ovarium versus apicem prasertim ad angulos pi. m. hirsu- 

 tulum. Flores mediocres, in involucro (sajpius profunde 5-9-fido 

 lobis patentibus mox reflexis) numerosi, basi stipitiformi in pleris 

 elongata. (Species limitatione difficiles.) 



++ Caules floridi adsurgentes plus minus foliati et ramosi. 



14. E. polyanthum, Benth. in DC. p. 12. Ultrapedale, laxe ramo- 

 sum ; foliis plerisque verticillatis vel inferioribus verticillato-fascicu- 

 latis ovatis oblongisve nunc sublanceolatis acutis subtus prresertim 

 albolanatis; pedunculis aut solitariis vagis aut 2-5 umbellatis; basi 



