JAUMEA OOMPOSlTiE 353 



LA8TU&NIA 



67 Actinella Rays 8-12, pistillate: involucre of numerous bracts : recep- 

 tacle conical or convex : pappus of 5-12 hyaline palese. 



■i- Bracts of the involucre or their tips spreading or reflexed : 



rayscuneate, 3-5-lobed: pappus of hyaline usually awn-pointed palese. 



68 Uelenlnm Bays commonly fertile: receptacle wholly naked. 



69 Gaillardia Rays neutral: receptacle with some rigid awnn among the 

 flowers: achenes involucrate with villous hairs. 



Subtribe i, Jaumieae. Involucre of broad bracts, imbricated in 

 two or more series. Liguhs not persistent. Aehenes 5-angled or 

 terete, several-nerced. Many-flowered heads, in ours, radiate and 

 the rays fertile. 



58 JAUMEA. Pers. Syn. PI. ii, 367. 



Herbs or suifruticose plants with opposite entire leaves and 

 terminal pedunculate heads of yellow flowers. Involucre cani- 

 panulate, its bracts fleshy or membranaceous, the outer shortest. 

 Corollas glabrous. Receptacle naked. Style-branches pappillose 

 or hairy, lanceolate or short-eonical at tip. Achenes all alike, 

 linear, 10-nerved, more or less angled. Pappus in exptic species 

 of narrow pointed or awned 1-nerved palese, 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-, 

 lumbla to California. 



Subtribe ii, Heleniese Cass Involucre hardly at all imbricated; 

 its bracts when broad nearly equal or in a single series. lAgules not 

 persistent. Disk-flowers numerous, with 5 or rarely ^ 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 f illen 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 tn linear, usually tapering to the base, few-nerved 

 and angled or nerveless, not callous-margined. 

 69 LVSTHENIA Cass. 



Glabrous and smooth annuals with opposite entire sessile 

 leaves and ra'her small heads of yellow flowers terminating the 

 branches. Heads radiate, or discoid by the diminuation 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 oi narrowly oblong, compressed, slightly 

 2-3-nerved or nerveless, nearly marginless. Pappus of 5-10 

 subulate firm palese, or none. 



