356 COMPOSITE. Leptosyne. 



corollas with slender tube girt by a ring at the snmrnit, and a funnelform or 



more dilated 5-lobed limb. Style-branches of the disk-flowers truncate-capitate or 



tipped with a very short cone ; those of the rays little exserted. Akenes obcom 



pressed, flat, more or less wing-margined, similar in disk and ray. Pappus none, or 



a minute callous cup. — Low glabrous annuals, or larger and more enduring plants 



with thickened succulent stems, all Californian ; leaves chiefly alternate, once to 



thrice pinnately parted into narrow linear or filiform lobes ; the showy heads of 



yellow flowers terminating long naked peduncles. — Gray, Proc. Am. Acad. viii. 657. 



Tuclcermannia, Nutt. 



Cokeocakpus (with Acoma), Benth. Bot. Sulph. , contains two or three still obscure species of 

 Lower California, allied to this and the preceding genus, but not very likely to occur within the 

 limits of the State. 



§ 1. Annuals, a span or more high, with long naked peduncles: heads an inch or an 

 inch and a half in diameter, including the oblong or cuneate-obovate more or 

 less 2>-lobed rays : scales of the outer involucre linear. — True Leptosyne. 



1. L. Douglasii, DC. Leafy only at the base: the peduncles all scape-like : 

 disk-corollas with a conspicuously bearded ring : akenes sparsely beset with capitate 

 rigid bristles, the winged border at length very thick and corky, the summit with 

 an entire cup-like ring in place of pappus. 



Dry or sandy soil, from near San Francisco (?) to San Diego. Except in the southern part of 

 the State apparently less common than the next. 



2. L. Stillmani, Gray. Stems more leafy below : involucre commonly some- 

 what hairy at base : disk-corollas beardless : akenes surrounded by a thick and 

 corky rugose wing, smooth and glabrous except the inner face, which mostly be- 

 comes sparsely papillose, and often bears a row of tubercles on the midnerve : the 

 cup in place of pappus either entire or 2-lobed. — Bot. Mex. Bound. 92. 



Hillsides and plains, Valley of the Sacramento to the Bay, &c. ; the common species in the 

 central part of the State. Bays somewhat cuneate-obovate. 



3. L. Newberryi, Gray. Leafy only at base : the peduncles scape-like : disk- 

 corollas witli a shorter tube bearing an inconspicuously bearded ring : akenes 

 (young) with a very thin wing, both faces minutely glandular-bristly, the cup at the 

 summit obscure. — Proc. Am. Acad. vii. 358. 



Sitgreaves Bass, on the Colorado, Newberry. Camp Grant, Arizona, Palmer. Berhaps not 

 within the State. 



§ 2. Succulent thickened stems or rootstoclcs pierennial, leafy, often branched: leaves 

 rather fleshy : heads large. ■ — Tuckermannia, Gray. 



4. L. maritima, Gray. Stems rather low, herbaceous, from a fleshy tuberous 

 base or caudex : peduncles a span to a foot or more long : heads (including the nar- 

 rowly oblong slightly 3-toothed rays) 3 or 4 inches in diameter : ring of tube of the 

 corolla naked : akenes smooth and glabrous, bordered by a narrow thinnish wing or 

 margin, wholly destitute of pappus. — Proc. Am. Acad. vii. 538 ; Eegel, Eev. Hort. 

 1872, with plate. Tuckermannia maritima, Nutt. ; Torr. & Gray, Fl. ii. 355 ; Torr. 

 Bot. Mex. Bound. 92, t. 31. 



Sea beach at San Diego, and on the islands. A striking and showy plant. In cultivation a 

 short naked awn is rarely produced from each margin of the akene ! 



5. L. gigantea, Kellogg. Stems shrubby or fleshy-woody, 2 to 8 feet high 

 and 1 to 5 inches in diameter, leafy at the top : heads numerous and corymbose, 

 rather short-peduncled : inner scales of involucre with a prominent midrib : divis- 

 ions of the leaves more filiform. 



San Miguel and Santa Barbara Islands, Harford, Copt. Forney. Guadalupe Island, Palmer. 



