SUNFLOWER FAMILY. 497 



Low moist grou)id: Corto Madera, Marin Co. (the type locality) to 

 Solano Co. (aoc. to Greene). 



3. S. Bolanderi (Gray) Greene. Slender plants, 1 to IJ ft. high; 

 stems several, decumbent, leafy at base only; leaves linear-lanceolate, 

 entire or with a few salient linear lobes, the radical 9 to 12 in. long, 

 including the margined petiole; bracts attenuate from a broadish base 

 or some outer ovate, rather regularly imbricated; pappus 5 lines long, 

 the ovate palea J line long, abruptly tipped with the long slender 

 awn. — (Microseris Bolanderi Gray.) 



Swampy places in the North Coast Ranges: Marin Co. northward 

 to Mendocino and Humboldt Cos. 



4. S. procera (Gray) Greene. Stem robust, 2 to 3J ft. high, 

 leafy-stemmed, the branches long and erect; leaves entire or denticu- 

 late, the radical and lower cauline f to IJ ft. long and 1 to 2 in. wide, 

 the upper cauline smaller, all acuminate and tipped with a short 

 rigid point; involucre 1 in. high and as broad or broader; outer 

 bracts broadly ovate and abruptly short-pointed, the inner ovate to 

 lanceolate and attenuate; achenes 2J lines long; pappus 5 or 6 lines 

 long; paleas 1 to IJ lines long; awn minutely scabrous. — (S. maxima 

 Bioletti. Microseris procera Gray.) 



North Coast Eanges: Sonoma Valley, Torrey, Bioletti; Knight's 

 Valley, Dam/; Cloverdale; Ukiah, Kellogg. June-July. 



11. MALACOTHRIX DC. 



Ours annual caulescent or acaulescent ■ herbs, oomm<inly with a 

 radical cluster of leaves, the stems either leafy or almost naked. 

 Heads peduncled, commonly nodding in the bud. Flowers yellow, 

 white, or pinkish. Eeceptacle bristly or naked. Achenes short, 

 glabrous, terete, 10 to 15-ribbed, or 4 or 5 of the ribs stronger than 

 the others, truncate at apex and with an entire or denticulate border. 

 Pappus-bristles soft, scabrous, more or less united at base and 

 falling away together, or with 1 to 8 stronger ones which are more 

 persistent and smoother. (Greek malakos, soft, and thrix, hair, in 

 reference to the long wool on M. Californica, type of the genus.) 



Bracts of involucre linear to subulate, narrowly or not obviously scarious- 

 mare^ined, little imbricated. 

 Branching, mostly glabrous; heads 3 to 4 lines high. 

 Flowers white or pinkish; pappus not persistent . . 1. .V. obtusa. 



Flowers yellow; one pappus-bristle persistent 2. .V. Clevelandi. 



Acaulescent, long-woolly when young; heads 6 to 8 lines high 



3. M. Californica. 

 Bracts of involucre scarious, with green midrib, distinctly imbricated, the 

 outer orbicular; branching and glabrous plant . .4.M. Coulteri. 



1. M. obtusa Benth. Stem paniculately branching above the 

 base, 4 to 16 in. high, nearly naked; radical leaves dentate or pin- 

 natifid, the margin often bearing scattered tufts of wool; heads small, 

 numerous; involucre about 3 lines high, its main bracts linear, 

 acuminate and nearly equal, with a few short ones at base, the tips 

 usually purplish (as" also in the next); achenes obovate-oblong, the 

 summit entire, none of the pappus-bristles persistent. 



34 



