COMPOSITE. 461 



equal length. Corollas with slender tube and funnelform 5-lobed limb. 

 Style-branches linear-semiterete, minutely papillose-puberulent exter- 

 nally, obtuse. Acheues terete, obscurely 10-striate, glabrous, or with 

 scattered fine hairs. Pappus of copious soft white bristles. 



1. L. liypoleuca, Benth. in Hook. Icon. t. 1139 (1873). Stems 1 ft. 

 high, equably leafy to the summit: leaves ovate-oblong to elliptic, 

 obtuse, 1 in. long, reticulate-veiny on the glabrate upper face, very white 

 beneath: heads 3^ in. high, on rather slender pedicels, forming an open 

 cluster: corolla-lobes about half the length of the funnelform throat. — 

 A somewhat rare sea-coast plant, found in the hills behind Santa Cruz, 

 and on Chimney Rock, Mendocino Co. 



102. RAILL ARDELLA, Benth. & Hook. Perennial tufted or matted 

 scapose herbs, with narrow entire mostly radical leaves, and slender 

 often long monocephalous scapes. Campanulate or cylindraceous invol- 

 ucre of a single series of linear bracts lightly connate below the middle. 

 Receptacle flat. Ray-flowers, when present, with cuneate deeply 3 — 4- 

 cleft ligules. Disk-corollas with rather short proper tube, narrow- 

 funnelform throat, and 5 ovate obtuse teeth. Achenes linear, subterete, 

 obscurely nerved, pubescent. Pappus of 12 — 15 long aristiform but soft- 

 barbellate bristles. 



1. R. argeutea, Gray, Bot. Calif, i. 417 (1876); Proc. Am. Acad. vi. 

 550 (1865), under RaUianlia. Leaves spatulate-lauceolate, silvery-silky 

 on both sides: involucre 7 — 15-flowered, terminating a glandular scape 

 '2 — 4 in. high : rays none. — Alpine slopes of the high Sierra, from above 

 Yosemite northward. 



2. R. scaposa, Gray, Bot. Calif. 1. c, and Proc. Am. Acad. 1. c, under 

 Raillardia. Larger, the leaves glandular and hirsutulous rather than 

 silky: scape often 1 ft. high and with 1 or 2 bracts: involucre often 

 20— 30-flowered, and occasionally developing a few imperfect rays. — 

 Range of the last. 



3. R. Pringlei, Greene, Bull. Torr. Club, ix. 17 (1882). Scapes l-lj^ 

 ft. high, from a branching rootstock, or rather from prostrate short 

 leafy branches: leaves almost linear, some of them remotely serrate- 

 toothed, glabrous; scape glandular under the large campanulate about 

 4-flowered involucre; bracts of involucre only lightly united near the 

 base: rays about 10, orange-yellow: pappus bristles fewer than in the 

 other species, and less plumose. — Subalpine in the Mt. Shasta region. 



108. WHITNEYA, Gray. Low canesceut perennial, with creeping 

 rootstocks, and upright mostly simple stems with a few pairs of reduced 



