SUNFLOWER FAMILY 337 
7. Machaeranthera orciattii (Vasey & Rose) Cronq. & Keck. Orcutt’s Aster. 
Fig. 5574. 
Aster orcuttii Vasey & Rose, Bot. Gaz. Ke Fo pl. 11, 1891. 
Xylorrhiza orcuttit Green os 3: 
Machaeranthera orcuttit Cro q. & te vith 9:239.-1957. 
Suffruticose, 0.5~-0. oi high, erect-branched, = leafy up to the heads, white-barked, glab- 
rous. Leaves oblong to narrowly elliptic, 2.2 m. long, 0.8-1.5 cm. wide, acute, sessile and 
slightly clasping, the margin with 7-10 ‘rather sieniies spinose teeth on each side and at apex, 
coriaceous, light green, slakeaiii or sometimes loosely ciliate, l-nerved and with a pair of lateral 
e€ 0 
ut , purple or lavender, about 2 cm. long; achenes densely silky-pilose ; 
pappus- ‘bristles stiff, unequal, the ini mayer flattened. 
Rocky p Lower Sonoran Zone; rn side the Colorado Desert on the slopes of the Santa Rosa 
= ge southward a “parhern Lower California Tire locality: Cariso Creek Wash, Imperial County, Cali- 
ornia. Apri 
00. CORETHROGYNE DC. Prod. 5: 215. 1836. 
Herbaceous perennials, sometimes suffrutescent at base, white-tomentose, often gl 
brate and glandular above, the stems and involucres often purplish tinged. eaves alter- 
0 obova 
solitary, cymose or panicled, the rays neutral, purple, violet, or oink. the is low, some- 
min i ate iemispheric 
. Involucre campa e 
several- to many-seriate, the phyllaries chiefly a ee spot es weakly so, or even 
with herba o re ef 
q 
female, referring to the peed hispid style-tips. | 
Anu — able genus in which many species and varieties have been described. These are all natives of Cali- 
fornia nay xcept for two forms wick extend into northern Lower Soop erence oa one — ch reaches south- 
western Oregon, restricted to that | state. Sy descriptions of the taxa listed below are based on authentic material. 
peeurey in any given spars completely conform py ne ra type an = the Sela aig ne 
Interm chats: orms a cole parti ealacky along the coast from southern ay; rthern 
Lower California and also “the southern slope of the tak Recnantes Mow aot: irs ed a ea sills. 
species, Corethrogyne californica DC. 
Inflorescence of solitary heads or sometimes 2 0: 
Stems ais pote ate e except for the ascending pobanie ius Shanske: leaves broadly — or og rounded or 
cate at the apex . C. abov 
Stems Set except for the decumbent and unbranched, or decumbent and PES slots. tate oblance- 
olate to linear-oblanceolate, the pen xan sometimes mucronate. 
Stems erect from the decumbent base; flowering branches sparsely bracteate. 
Phyllaries 1-1.5 mm. wide, the tips erect. 2 C. californica 
Phyllaries 2-2.5 mm. wide, the tips lax and defle ie Gee cobitoecnice: lyon. 
Stems much branched and often decumbent; Riepicien oc onl densely sr oi hy 
3. C. leucophyila. 
Inflorescence of few to many heads, openly branched or congested. 
Lower ¥ canes always —— i! linear-lanceolate (1-8 mm. wide), entire or mearly so; heads large; plants of 
al San Diese ® 
y and aay glandular, the phyllaries loosely imbricate and 
5. é . mcana. 
Involucre persistently white-woolly, the phyllaries closely imbricate, appressed. 
. C, linifolia. 
Lower Rowe ce sity oblong, or spatulate (about 8-20 mm. wide), mostly ‘otha above; heads small 
ept in C. sessilis 
Pcie a eg high; pliviisties white-floccose and weakly cartilaginous; | ger open of eg Bernardino 
Mou . 
Involucre seen mm. high; pi Mari gl jul and strongly Zz 7 Ay ‘Aaginifolia. 
£OT ED 
1. sacha said obovata Benth. Prostrate Beach-aster. Fig. 5575. 
Corethrogyne obov enth. Bot. Sulph. 22. 1844. 
Corethrogyne poate agg Gray, Proc. Amer. Acad. 7: 351. 1868. 
Corethrogyne californica var. obovata Kuntze, Rev. ais Pi. 1: 330. 1891. 
Corethrogyne californica a spathulata Kuntze, loc 
Perennial from a woody with numerous more or less tomentose, leafy stems 1.5-5 dm. 
long and few ascending eee ieuiciak Leaves (1.5) 2-3.5 cm. long, 8-22 mm. wide, the 
