_ ° 
4 
3 
; 
JAUMEA COMPOSIT 353 
LASTHENIA 
67 Actinella Rays 8-12, pistillate: involucre of numerous bracts: recep- 
tacle conical or convex : pappus of 5-12 hyaline entire pales. 
+ + Bracts of the involucre or their tips spreading or reflexed: 
rays cuneate, 3-5-lobed: pappus of hyaline usually awn-pointed palezx, 
68 Helenium Rays commonly fertile: receptacle wholly naked. 
69 Gaillardia Rays neutral: receptacle with some rigid awns among the 
flowers: achenes involucrate with villous hairs. 
Subtribe «1 Jaumiex. Involucre of broad bracts imbricated in two 
or more series. Ligules not persistent. achenes 5-angled or terete, 
several-nerved. Many-flowered heads in owrs radiate and the rays 
fertile. 
58 JAUMEA Pers. Syn. PI. ii, 367. 
Herbs or suffruticose plants with opposite entire leaves and 
terminal pedunculate heads of yellow flowers. Involucre cam- 
penne’, its bracts fleshy or membranaceous, the outer shortest. 
orollas glabrous. Receptacle naked. Style-branches pappillose 
or hairy, lanceolate or short-conical at tip. Achenes all alike, 
linear, 10-nerved, more or less angled. Pappusin exotic species 
narrow pointed or awned 1-nerved pale, in ours none. 
J. carnosa Gray Bot. Wilkes 360. Glabrous perennial: stems procum- 
bent or ascending, herbaceous, leafy 6-18 inches long: leaves spatulate- 
linear, almost terete, very fleshy, about an inch long, sessile and connate 
at base: heads erect, on short peduncles, 6 lines high: rays 6-10, linear, 
not surpassing. the disk: receptacle conical, smooth and fleshy: achenes 
glabrous, destitute of pappus. In salt marshes along the coast, Brit. Co- 
lumbia.to California. — - 
Subtribe ii, Heleniex. Cass. Involucre hardly at all imbricated; 
its bracts when broad nearly equal, or in a single series. Ligules not 
‘ persistent. Diskjflowers numerous, with 5 or rarely 4 teeth or lobes. 
Achenes few-nerved or angled, or more numerously striate-angled 
only when turbinate or pyriform. 
* Receptacle conical beset after the achenes have fallen by project- 
ing points. Bracts of the involucre herbaceous, in one or rarely two 
series, commonly broad, sometimes cupulate-connate. Achenes nar- 
row, from oblong to linear, usually tapering to the base, few-nerved 
and angled or nerveless, not callous-margined. 
59 LASTHENIA Cass. 
Glabrous and smooth annuals with opposite entire sessile 
leaves and rather small heads of yellow flowers terminating the 
branches. Heads radiate, or discoid by diminution of the 
ligules; disk-flowers all fertile. Involucre a single series of 
herbaceous bracts united by their edges into a 5-15-toothed cup. 
Disk-corollas 4-5-lobed, with rather slender tube and dilated 
throat. Achenes linear or narrowly oblong, cone slight- 
ly 2-3-nerved or nerveless, nearly marge appus of 5-10 
subulate firm paleze, or none. 
