164 COMPOSITAE 
15. Layia heterotricha (DC.) a & Arn. Pale-yellow Layia. Fig. 5251. 
Madaroglossa heterotricha DC. Prod. 5: 694. 18 
Ess ke terotricha Hook. & Arn. Bot. Beechey Sup 358. 1838. 
Layia graveolens Greene, Bull. Calif. Acad. 1 1 B8Os 
Blepharipappus So siege Braue ze 1892, 
a s Gre 
Blepharipappus odiaaidlecas var.  eterorich Jeps a ee W. Mid. Calif, 536. 1901. 
Layia glandulosa var. heterotricha H. 1, Univ. Calif. Pub. Bot. 3: 157. 1907. 
Stem stout, simple or with fe sharply ascending branches, 2-9 dm. high; herbage "py ae 
or less cnet. heavily odorous. Leaves short-hispid, see de and glandular , crenate or shor 
dentate, the upper onan involucre 8-12 m mm. ay densely hispid and eae gules a 
white to pale yellow, not tipped with white, often fading rose- Riba 6-15( snl long, 4. a 
12(-15) mm. wide; i 35-85, the corolla 4.5-7 mm. long; ray-achenes 4. "2 or pes m. lon 
disk-achenes 4.3-6.3 mm. long; pappus of 14-19 very eae. clistestin ng nie deckinos | bristics 
3.5-6 mm. long, plumose to above middle with pes i capillary hairs equaling the bristles 
Grassy places, in mud flats or heavy adobe soils, Sonoran and Transition Zones; west side of — ‘Troan 
bhai and Sey ats Inner Coast aves (also Santa Lucia Mountains) to Mount Pinos and Tehachapi Pass, Cali- 
rnia. ocality: California. March—June. 
30. MADIA Molina, Sagg. Chile ed. 1. 136. 1782. 
Mesophytic or xerophytic herbs, usually very glandular and heavy-scented. Leaves 
linear or oblong, the basal entire to remotely denticulate. Involucre more or less angled 
by its deeply oe phyllaries which completely enclose the ray-achenes. Receptacle bear- 
erile. Ray-achenes usually laterally compressed, with flat sides, narrow back, and sharp 
ventral angle (see also M. minima), jongitudinally. aeaae. Pappus usually none in ray- 
achenes, sometimes present in disk. achenes. [Madi, the Chilean name of the original 
speci 
A genus of 18 species of Pacific North and South America. Type species, Madia sativa Molina. 
pie eee Sm heads not yeoec (Section Anisocarpus). 
Tall p nnist ° Bo dened oods; leaves opposite well up stem, those of the rosette wider; pappus of soft 
eolate p: 
Ben and fertile; ray-achenes without beak; involucre 10-12 mm. high; anthers black. 
1. M. bolanderi. 
Disk-achenes << way-acheuts beaked: inrolunre 5-6 mm. high; pte a 2. M. madioides. 
Low vernal annua first basal airs, those of the rosette 
Disk- — tert lig 8? of wider paleae; anthers yellow; ligules dabellitoras slate 5-25 cm. tall. 
nches ; buds and fruiting heads nodding; pappus only on disk-achenes, manos: attenuate, 
<2 et a a . long. nutans. 
dame = strc, ep na pegs heads strictly erect; pappus of ray and disk similar, ere. or quad- 
e, 0.2-0.3 mm. lon ng. . M. hallit. 
Disk } pappu: i lou flexuous awns; anthers black; ligules obova 
Heads medium; ray-flowers 7-10, ligules 5-9 mm. long; disk-flowers sedge plants ag gpredion em. high. 
mii. 
Heads ora ray-flowers 4-7, ligules 2.5—3 mm. long; disk-flowers 2-7; slender plants — cm. high. 
high. 6. M. yosemitana. 
Pappus none; annuals (Section Eumadia). 
Disk-flowers more than 1 (except rarely in M. glomerata), pubescent; phyllary with empty 
Ray- ce prominently beaked; icestaralar bracts deciduous; heads not closing, whe ig Vigules —— 
Ray- achenes ot prominently beaked; receptacular bracts more or less persistent; heads | arg aaa 
a 
Disk-achenes sterile; receptacle pubescent; ray-flowers conspicuous (except in M. citriodora). 
Ray- Dc penrid compressed, with narrow backs oe in subsp. wheeler) ; ugues bright ee 
conspicuous; herbage not lemon-scented . M. eleg 
Ray-achenes scarcely compressed, with bicell backs; ligules “a yellow inconspic ous; 
he bse Be — scented. dora. 
Disk f ; receptacle glabrous; ray-flowers inconspic 
Ray- pete 6- ee ray- eran broadest toward top with omatl ceate. 
Achenes obovoid, black and shin it 10. M. anomala. 
Achenes strongly la Ager compressed, dull. 
Glandular sya 3 tr ‘abitie. decked and flexuous; heads small (to 9 mm. high); early; 
mostly in 
sig in a | obi like raceme; herbage yellow-green; bie a i County to 
ty, California, M. subspicata. 
Heads paniculte (or openly racemose) ; herbage grayer or ou green. 
Side nches not surpassing main axis; cauline leaves narrow at base; 
rsely pilose with spreading hairs. 12. M. gracilis. 
Side branches surpassing main axis; a odias leaves broad at ie ase; herbage 
densely villous with rather appressed hairs. 13, M. citrigracilis. 
Glandular well down toward bane stem stout; heads usually large; late; mostly near 
the coast; wierd dera 
Heads whee duncled, red or subglomerate, bed ee. Page nar- 
rowly Sia ey Swag involucre 7-12 mm. high; Rasen 
but tall, the branches, if any, usually ascending. vt wae a3 
