530 compositjE. 



1. H. congesta DC. Soft-hirsute or villous, the inflorescence 

 slightly glandular; lowest leaves commonly opposite, ohlanceolate, 

 sparsely serrulate, the upper linear or linear-lanceolate and entire; 

 heads terminating paniculate or corymbose branches; bracts of the 

 involviere with lanceolate foliaceous tips, which are little surpassed by 

 the rays; outer bracts of the receptacle either lightly connate or nearly 

 distinct; achenes with conspicuous inflexed stipe. 



First collected by Douglas "in California," doubtless between 

 Monterey and Sonoma; not known to us; attributed by Greene to 

 Marin Co. , etc. 



2. H. luzulsefolia DC. Hay-field Takweed. Whole plant 

 excepting the lowest leaves very glandular and ill-scented; stems erect, 

 1 to 2 ft. high, corymbosely or paniculately branched at summit, or 

 branching more freely and diffuse; lovyer leaves crowded and more or 

 less tufted, narrowly linear, mostlj' tapering somewhat to the apex, 3 

 to 5 in. long, 1 or 3-nerved, canescent with appressed soft silky hairs 

 which are more or less floccose-deciduous; upper leaves much reduced; 

 heads numerous, on short peduncles, which are nearly naked or bear 

 very much reduced leaves; tips of the involucral bracts acute or 

 obtuse; outer bracts of the receptacle united into a cup; rays 6 to 10, 

 white or pink-tinged; achenes with very short stipe. 



Abundant in mowed hay fields and pasture lands: Sacramento and' 

 San Joaquin Valleys and westward through the Coast Eange hills 

 and valleys to the ocean. July-Oct. 



Yar. lutescens Greene. Flowers yellow. — Fields near the Bay, 

 in Contra Costa, Napa, and Marin Cos. 



Var. citrina (H. citrina Greene). Lowest leaves glandular-pubes- 

 cent, without appressed woolly hairs; flowers lemon-yellow. — 

 Northern Marin Co. Apr.-May. 



3. H. Cleveiandi Greene. General habit of the preceding, but 

 the herbage much less glandular; involucres white-hairy toward the 

 base; heads disposed to be racemose on the branches as well as 

 terminal. 



Lake Co.; to be expected in eastern Napa Co.; rarely collected. 



4. H. corymbosa(DC.)T. & G. Coast Takweed. Corymbosely 

 and widely branching, 1 to IJ ft. high, hirsute-pubescent and glandu- 

 lar; radical and often some lower leaves pinnately divided into 

 linear lobes, the upper and those of the flowering branches linear and 

 entire; heads Jin. high, 7 to 10 lines broad; rays 12 to 25, oblong- 

 cuneate, 2 to 4 lines long, 3 or 4-toothed; pappus of the sterile disk- 

 achenes of minute fimbriate-bristly scales, or of entire scales, or none; 

 ray-achenes with a short upturned beak on the inner side at apex. — 

 (H. angustifolia DC.) 



Abundant in valley fields and on hillsides: Berkeley to Santa 

 Cruz and Monterey Co. June-July. 



5. H. Kelloggii Greene. Erect, paniculately branching, IJ to 

 2J ft. high, the heads on slender pedicels; herbage mostly hispid 

 below and glandular above; leaves linear and entire, those of the 



