174 PROCEEDINGS OF THE AMERICAN ACADEMY 



Linnsea. E. Simpsoni /3. floccoso-lanata, Benth. 1. c. — Plains of 

 Nebraska, Arkansas, and Texas to the Rocky Mountains and New 

 Mexico. — Forma parviflora, involucris brevioribus lana floccosiore, 

 caule cyrais nonnullis axillaribus proferente. E. cymosum, Benth. 

 1. c. — "Western Texas, Wright. N. Chihuahua, Thurber. 



44. E. multiflorum, Benth. Eriog. Lana floccosa albidum ; foliis 

 oblongis lanceolatisque undulatis, caulinis sessilibus basi obtusa vel 

 auriculata ; involucris perplurimis 5-lobatis extus saepe denudatis intus 

 ai'achnoideo-lanatis ; perigonii segmentis eximie biseriatis, exterioribus 

 orbiculato-ovalibus demum sinu profundo cordatis, interioribus fere 

 linearibus. — Plains of Arkansas, Louisiana, and Texas. 



§ 11. Virgata, Benth. Flos basi haud producta ipsa cum pedi- 

 cello articulatus ; perigonium 6-partitum fere semper glabrum. 

 Ovarium glabrum vel ad angulos hispidulum. Involucra (sajpius 

 parva vel angusta) sessilia, secus ramos paniculae plerumque vir- 

 gatos unilateraliter disposita. Embryo incurvus, cotyledonibus 

 brevibus radicular gracili pi. m. incumbentibus. 



* Perennia, in paucis basi suffruticosum, incano nunc floccoso- 

 lanatum. Flores albi, nunc roseo tincti, glaberrimi, in involucro 

 plures. 



-t- Perigonium basi lata quasi truncatum, ob segmenta 3 exteriora 

 accrescentia lato-ovalia marginibus a basi ipsa discretis atque 

 subauriculato-rotundatis. Panicula saepe dichotoma. Bracteaj 

 plerumque subfoliosi. 



45. E. niveum, Dougl. in Benth. Eriog. Tomento denso (in 

 caulibus floccoso) candido-lanatum, ultrapedale, basi suffruticosum ; cau- 

 libus floridis infei'ne foliatis vel subnudis ; foliis ovatis oblongisve longius 

 petiolatis ; involucri dense lanati dentibus 3-4 subulatis cum bracteis 

 pi. m. recurvo-patentibus, ceteris minutis vel nullis ; perigonii segmentis 

 exterioribus mox accresceutibus orbiculato-ovalibus (basi fere cordu- 

 latis) interiora obovato-spathulata inferne angustata includentibus. — 

 Interior of Oregon and Washington Territory, Douglas, Geyer, Spal- 

 ding, Cooper, Lyall. 



Var. decumbens (E. decumbens, Benth. 1. c.) : forma ramosiore, 

 ramis nunc decumbentibus magis foliatis, floribus paullo majoribus. — 

 Interior of Oregon, Douglas. No other specimens are so well marked 

 as those of Douglas, but Spalding's plant approaches them. Bracts in 

 the species mostly equalling or exceeding the involucre, the three more 



