SUNFLOWER FAMILY 333 
Annual, biennial, or perennial herbs; heads few to comet on ne branching inflorescen eC. 
Phyltlaries narrowly linear, the sibeabietts loose, gree 
p han the indurated — 
1, M. tephrodes. 
lin. the erect or squarrose green tips shorter than the indurated base. 
dere ses not Poni fina 3—4(5)-seriate; plants mostly low perennials with heads 6-8 mm. high 
. M. shastensis. 
ee ea imbricate, 6-10-seriate; plants mostly tall biennials or perennials ne heads 8-15 mm 
1g 
Phyllaries not squarrose, not evident glandular; lower leaves sparingly if at all “pa — 
plants of San Die sn Count 
nsis, 
ates squarrose, usually habit lower leaves usually conspicuously Per Sane ae wide- 
read s adiak caemplen: 4. M. canescens, 
Plants scabs eae civics at tips rf chica 
Ste ae ndular and hispid, 
ofte ; leaves chiefly lanceolate or lance-linear, pubescent like the stem 
rarely glabrous except ; as the ¢ cents margin; phyllaris densely glandular- hirtellous Fg sera Pe gg 
ti 
Stem er or slightly glandular toward apex; leaves chiefly oblon labro Sons oF i gana sparsely villous- 
phyllaries essentially glabrous dorsally, usually stipitate- wr ra dular argin. 
coe erties linear-attenuate, equaling or exceeding the inner; peduncles lasdoler on 
. M. cognata, 
Outer phyllaries i oe acuminate, much shorter than the inner, the involucre boaters graduate; 
peduncles glabrous. 7. M. orcuttii. 
. Machaeranthera tephrodes (A. Gray) See: Ash-colored Aster. Fig. 5568, 
Machacranthera tephrodes ‘nee Pittonia 4: 18 
Aster tephrodes Blake, Contr. U.S. Nat. Herb. 25: 563. "1928. 
Erect biennial, single-st temmed, — Deschard whined branched, 2-8 dm. high; stem cinereous- 
puberuent or -pilos me se with — ved ha Larger leaves pion te or lanceolate, 
3-10 cm. long, 
lon Me 10 n wide, acu e teal wer tapering to a petioliform base, the others sessile nd 
— slightly claspng, shallow ‘ly oahed with spinescent- parebicagiia 
ather firm 
teeth, pubescent c g 
r less distinctly triplinerved, t ~ upper gradually cuore to small entire 
eo eae. 2 8-4 ¢ ply wiitles hg at tips of cym acl or paniculately arranged br oT i 
involucre hemispheric, 8-10 mm, high, 6—8-seriate, eradviit , the phyll ria aerowly linea 
anceolate, cinereous Sas. eon hs leap atin s bas d_ shor than the su slate: 
attenuate, cronate, spreading or reflexed, herbaceous tip; about 23-40, = et or purple, 
1-1.2 cm. long; achenes striate, finely pubescent; tops us Stiffish, poor gradua 
leys and river bottomlands, Sonoran Zones; southern Nevada and eastern San po ee County, 
Californ a, south and west to Riverside, San Diego. and “Imperial Coustaa. and adjacent er California, east: 
ward to ‘Ari izona, Sonora, and New Mexico. i locality: ‘“‘between the Del Norte and the waters of the Gila 
April-Dec 
2. Machaeranthera lagunénsis Keck. Laguna Aster. Fig. 5569. 
Machaeranthera lagunensis Keck, Brittonia 9: 238. 1957. 
rect perennial with few to several fealty, cinereous- bg gohagse stems 3-7 dm. high from an 
erect branched caudex. Lower leaves 4-8 cm. long, abou wide, r — er firm, a and 
narrowed to a netiole cranes puberulent to y akrods: Sot i with be onal spinulose-denticu- 
late teeth ; upper leaves reduced, sessile, acute at apex, petit ag seeplose. pet Y eather thinly 
opti 
RY 
5566. Aster brachyactis 5567. 1 l icoid 
