Malacothrix. COMPOSITE. 433 



First collected by Coulter, probably in the southern part of the State. Sitgreavcs Pass {New- 

 berry); Naciniiento Eiver and San Luis Obispo, Brewer. Apparently on the Sacramento or San 

 Joaijuin, Filch, Kellogg. Involucre over half an inch in diameter, not unlike that of a Xeranihi 



mum. Structure in other respects wholly that of Jfa/'tcut/irU: 



§ 2. Involucre of narrow and acute or acmniu.it,> wales, slightly if at all scarious, in 

 2 or 3 series. [Pappus present.) — MalaCOTHBIX proper. 



* Annuals : flowers light yellow, often turning purple. (Leptoseris, Xutt.) 



+- Head large, solitary, terminating mostly simple naked scapes. 



2. M. Californica, DC. Loosely long-woolly when young, sometimes nearly 

 glabrous with age : leaves mostly all in a radical tuft, laeiniately pinnately parted 

 into very narrowly linear divisions : scapes ascending, a span to a foot high : scales 

 of the broad involucre linear-subulate, loosely imbricated : akenes narrow, minutely 

 and obtusely striate-ribbed (acutish and with a minute callus at the base) : outer 

 pappus of 2 persistent bristles, between the bases of which are several very minute 

 pointed teeth. 



Var. glabrata, Eaton in Bot. King Exp., 201, is a form apparently destitute'of 

 wool, even when young. 



Open grounds, rather common from the Hay of San Francisco to San Diego, and east to the 

 borders of Nevada and S. Utah, where the smooth variety was collected by Anderson, Watson, 

 Parry, .v<-. Bead as large as that of a Dandelion, on a scape which is usually naked to the base, 

 rarely with a leaf or two, and with a tendency to bear lateral heads. 



-f- -t- Heads smaller and paniculate on. branching st ms or scapes: involucre of equal 

 scales and a few short calyculate ones at base. 



++ Pappus with one or more somewhat persistent stouter and naked bristles. 



3. M. Torreyi, Oray. A span to a foot and a half high, rather leafy, nearly 

 glabrous : branches and especially the peduncles more or less beset with some gland- 

 tipped bristles: heads rather large : involucre eampanulate and many-flowered: 

 akenes linear-oblong, very strongly ribbed ; the 5 principal ribs almost wing-like, 

 the pair in each interval much less prominent: outer pappus of 4 to 8 (usually ■">) 

 stout persistent bristles, between the thickish bases of which arc minute teeth. 

 — Proc. Am. Acad. ix. 213. .)/. som-hoides, Torr. in Stansbury Rep. 392 ; Gray, 

 PL Wright, ii. l<>-">, in part; Eaton in Dot. King Exp. 201, not of Torr. & Gray. 



Eastern side of the Sierra Nevada, mi the borders of the State {Anderson, Watson, Lemnum) : 

 thence east to Salt Lake and the southern part of Utah. Involucre sometimes half an inch high, 

 gem rally smaller. 



4. M. Xanti, Gray, 1. c. Slender, glabrous or slightly woolly when young: 



stem scape-like and loosely panicled, a font nr iv high: leaves mostly radical, 



runcinate-pinnatifid, thin; the cauline cues small and with al si filiform lobes : 



head small: involucre cylindrai as, rather few-flowered: akenes linear-oblong, 



obtusely 15 ribbed, with 5 ribs moderately stronger, the cup-like apex obtusely 5- 

 toothed: outer pappus of 3 to 5 very slender and partly persistent bristles. — 

 M. parviflora (?), Gray, Proc. Am. Acad. v. 163, not of Benth. 



Cape San 1. 111 as, Lower I 'aliforaia {Xantus). It may occur in tin southern part of the State. 



5. M. Cleveland!, I Iray. slender, glabrous; stem rather naked, loosely pan- 

 icled, a foot or more high, bearing numerous heads: leaves thin, all linear, spar- 

 ingly laciuiaie pinnaiiiid : involucre eampanulate, rather many-flowered; the scales 

 given with brownish or purplish tips: young akenes cylindraceous, equably and 

 lightly striate uerved 1 miter pappus of one stout bristle and a crown of many 

 spicuous thin and white teeth; soft bristles of the inner pappus disposed to fall 



p nately. Proc. Am. Acad, Lned. 



Near San Diego, /'. Cleveland. Also Quadalupo Island, Lower California, Pr. /■'. Palmer. 

 Leavi ..'Inn hi two wide oven the radical onos seldom over 2 or 3 lines broad, from 1 to 3 inches 



