204 COMPOSITE. 



* Brads of involucre joined into a toothed cup. 



1. L. glaberrima, DC. Stems weak, decumbent, 1 ft. long or less, 

 very glabrous: leaves linear, entire: heads nodding in bud: involucre 

 about 15-toothed: rays very short; all the corollas shorter than their 

 broadly linear pubescent achenes: pappus of 5 — 10 firm chaffy scales, 

 2 or 3 of them subulate-pointed or short-awned, the others not so. — 

 Subaquatie herb of shallow winter pools on low plains or in depressions 

 among the hills; not very common. May, June. 



2. L. glabrata, DC. Stout, sparingly branching, 1 — 2 ft. high, 

 peduncles few, elongated, erect: leaves, at least the upper pairs, ovate- 

 lanceolate, coarsely but irregularly toothed, conspicuously connate at the 

 dilated base and forming an open cup rather than sheath: heads very 

 large, 1 in. wide: achenes dark, smooth, without pappus. — Borders of 

 salt marshes only; not common. June. 



3. L. Californica, Lindl. More slender, almost diffusely branching, 

 the many and not elongated peduncles forming a corymbose top to the 

 herb as a whole: leaves narrow, entire, divaricately spreading, not dilated' 

 or manifestly connate below: heads % in. wide. — Abundant on low plains, 

 and even moist slopes of hills. Much ^ore common than the last, and 

 inexcusably confounded with it for many years. May, June. 



4. L. chrysantha (Greene). Habit, foliage and flowers of the last, 

 but plant smaller: achenes obovate-oval, much compressed, surrounded by 

 a border of very short clavate closely packed hairs. — Plains of the San 

 Joaquin; perhaps altogether outside of our district. April. 



5. L. conjugens, Greene. Only a few inches high; leaves narrowly 

 linear, only the lowest entire, the others cleft into several pairs of long 

 linear segments, these entire or toothed: involucral bracts united below 

 the middle only: achenes very small (1 line long) olive-green and polished: 

 pappus none. — Subsaline soil near Antioch; closely connecting this 

 group and the following. April, May. 



* * Involucral bracts distinct. 



■i— Herbage often slightly villous- or floccose-lomenlose ; pappus 

 of palese or awns, or both, or none. 



6. L. Freinonti (Torr.). Erect, slender, 8 — 10 in. high, only hirsute- 

 pubescent: leaves mostly palmately parted into linear lobes: involucre 

 broad; bracts 10 or 12; rays as many, the oval ligules not longer than 

 the width of the disk: pappus of 4 slender awns and as many or more 

 numerous small palex, or rarely none. — Moist plains from Napa and 

 Solano counties southward. May. 



7. L. Burfcei (Greene). Much like the last, but taller, 1-2 ft. high: 

 pappus of 8 — 10 minute entire acute palese and a single rery long and 

 slender awn. — Southern Mendocino Co. ; to be expected in Sonoma. 



