$14 COMPOSITA MACH ERANTHRA 
BRACHYACTIS 
pinnatifid or rarely entire leaves and solitary or corymbosely or 
racemosely disposed heads of purple-rayed flowers. Heads many 
flowered, the rays numerous, in a single series, pistillate ; those 
of the disk tubular and perfect, with 5 short erect teeth. Bracts 
or the obovoid or turbinate involucre closely imbricated for the 
most part in several series, linear rigid. somewhat carinate, un- 
equal, with herbaceous squarrose-spreading or recurved tips: re- 
ceptacle flat, somewhat alveolate ; the alveoli toothed or lacerate. 
Style-appendages filiform subulate or linear-lanceolate, minutely 
hirsute. Achenes turbinate or cuneiform, often compressed, 
pubescent or silky. Pappus of numerous scabrous and rather 
rigid very unequal bristles. | 
M. Shastensis Gray Proc. Am. Acad. vi, 539. Aster Shastensis Gray. 
Canesc+nt with aclose scurfy tomentum: stems slender, 4-8 inches hig 
from a perennial root, paniculately branched: leaves linear-spatulate to 
linear, 1-2 inches long with a few teeth near the middle: heads rather nu- 
merous, scattered, 5-6 lines high: bracts of the inyolucre linear, acute: the 
outer ones shorter and often with spreading tips: rays 12-20, violet 3-6 
lines long: style appendages slender-subulate: pappus simple and soft: 
achenes narrow, hardly at all compressed, silky-pubescent. Southeastern 
Oregon (Camp Polk) to Northeastern California. 
M. eradiata Aster Shastensis var. eradiatus Gray. Whole plant some- 
what glaucous and canescently puberulent: stems stoutish, 6-10 inches 
high from a stout perennial root: leaves oblanceolate 1-2 inches. long, 2-6 
lines broad, attenuate below to a margined petiole, obtuse or acutish min- 
utely apiculate, entire or sparsely serrate: headg rather numerous, 4-5 
lines high: bracts of the involucre linear, acute, in 3-4 ranks, the outer 
successively shorter and more eubulate: rays wanting: achenes sparsely 
pubescent. On high rocky ridge of the Siskiyou and Scott’s mountains. 
M. attenuata. Whole plant cinereous: stems stoutish, 1-2 feet high 
from a large perennial root: cauline leaves linear, reduced above to sub- 
ulate bracts, all acute and apiculate: heads, numerous terminating in the 
branchlets: involucre hemispherical, its linear bracts well imbricated in 
several series, the outer successively shorter and passing into the ordinary 
bracts of the branchlets, the inner ones attenuate above to a slender bris- 
tle: rays dark purple, numerous 5-6 lines long: style appendages slender- 
subulate: pappus simple, of soft capillary bristles: young achenes silky- 
canescent. On sandy plains and banks near The Dalles, Oregon. 
20 d BRACHYACTIS Ledeb. FI. Ross, ii, 495. 
Annual or perennial low herbs with mostly entire leaves and 
solitary or racemose-paniculate heads of inconspicuous flowers. 
Heads many-flowered heterogamous; the rays very numerous 
and occupying more than one series, fertile. Involucre loosely 
imbricated, in few series of herbaceous bracts or the innermost 
somewhat scabrous. Receptacle flat, naked. Style appendages 
lanceolate. Achenes more or less compressed, Pappus simple of 
copious fine and soft capillary bristles. / 
B. frondosa Gray Proc. Am. Acad. viii, 647. Aster frondosus G. & T. 
Glabrous or nearly so: stems 1-12 inches high or more from an annual 
root branching from the base: leaves spatulate linear, 1-2 inches long, the 
uppermost passing into the involucral bracts, the lower attenuate below 
