Selianthus. COMPOSITE. 273 



Calif, i. 353. — California, from San Francisco Bay northward, Hinds (who got it at Bo- 

 degas), Bridges, Bolander, Mrs. Ames. 

 H. exilis, Gbay. A foot or so high, slender, commonly hirsute: leaves lanceolate and 

 ovate-lanceolate, sparingly denticulate, tapering into a slender petiole : heads from half to 

 nearly full size of those of the preceding : cusp of the chaff a slender awn, surpassing the 

 disk-flowers. — Proc. Am. Acad. vi. 545, & Bot. Calif. 1. c. — Plains throughout the northern 

 part of California. (The specimen from Owen's Valley, Van Horn, is probably a depau- 

 perate H. petiolaris.) 



# # # Stems branched from the base, diffuse or decumbent, slender. 



H. debilis, Nctt. Scabrous to hispidulous or hispid : stems a foot to a yard long : leaves ' 

 from ovate to deltoid or obscurely hastate, occasionally subcordate, thinnish, 1 to 3 inches 

 long, repand-denticulate to sparingly lobulate-dentate, slender-petioled : bracts of the invo- 

 lucre lanceolate and gradually subulate-acuminate : disk half-inch or more in diameter ; its 

 chaffy bracts with truncate or 3-toothed summit, the middle tooth aristiform-subulate : rays 

 half-inch or more long. — Trans. Am. Phil. Soc. vii. 367 ; Torr. & Gray, 1. c. 320; the coast 

 form. H. prcecox, Engelm. & Gray, PI. Lindh. i. 13, form with more hispid stem. — Sandy 

 shores of Florida, W. Louisiana, and E. Texas. 



Var. cucuraerifolius. A larger form, usually with purple-mottled stems, leaves 

 irregularly serrate with salient teeth, more commonly subcordate, the larger 4 or 5 inches 

 long, and the ampler (15 to 20) rays an inch or more long. — H. cucumerifolius, Torr. & 

 Gray, 1. c. 319. H. Lindheimerianus, Scheele in Linn. xxii. 159? — Sandy soil, often in 

 woods, Texas, common westward. ' 



§ 2. Perennials : receptacle convex, or in some at length low-conical : lower 

 leaves almost alwa}'s opposite. 



# Involucre loose (about half-inch high), more or less squarrose in age, of subulate-lanceolate or 

 narrower mostly attenuate-acuminate and almost equal bracts : disk (upper part of corollas) 

 commonly but not always dark purple or turning brownish: all but the lower leaves linear or 

 filiform and strictly one-nerved : slender creeping rootstocks, no tubers. 



H. OFgyalis, DC. Stem smooth and glabrous, often 10 feet high, very leafy to the top : 

 leaves mostly alternate, from long-linear (8 to 16 inches long, commonly 2 to 4 lines wide), 

 or the lowest lanceolate, to almost filiform, slightly papillose-scabrous, the lower narrowed 

 into a petiole and sometimes serrulate : bracts of the involucre filiform-attenuate, those of 

 the receptacle entire : akenes oblong-obovate with a rounded summit, 3 lines long. — Notul. 

 PI. Bar. Genev. 12, & Prodr. v. 586, excl. syn. ; Torr. & Gray, PL ii. 320. H. giganteus, var. 

 crinitus, Nutt. Gen. ii. 177? — Dry plains, Nebraska to Arkansas and Texas, west to S. E. 

 Colorado. 



H. angustifolius, L. Scabrous, sometimes hispidulous : stems 2 to 6 feet high, rather 

 sparsely leafy, slender: leaves thickish, entire, when dry with revolute margins: cauline 

 sessile (the upper hardly narrowed at base), 3 to 7 inches long, mostly 2 or 3 lines wide, 

 paler and smooth or sometimes canescent beneath, many of them opposite ; radical some- 

 what spatulate or lanceolate: bracts of the involucre lanceolate and acute or attenuate- 

 acuminate : rays numerous, inch long : disk generally dark-purple : receptacular bracts 

 entire or 3-toothed : akenes (barely 2 lines long) with broad truncate apex. — Spec. ii. 906, ; 

 Walt. Car. 216 ; Michx. Fl. ii. 141 ; Bot. Mag. t. 2051 ; Bart. Fl. Am. Sept. t. 105 ; Torr. & 

 Gray, Fl. ii. 320. Coreopsis angustifolia, L. 1. c. 908; Mill. Ic. t. 224, -f. 2; and Rudbeckia 

 angustifolia, L. Spec. ed. 2, 1281. Leighia bicolor, Cass. Diet. xxv. 436. — Wet ground, pine 

 barrens of New Jersey and Kentucky to Florida and Texas. 



# # Involucre closer, of more imbricated and unequal inappendiculate bracts, none of them folia- 

 ceous : disk mostly dark-colored or dusky : leaves from lanceolate to ovate, rarely linear : herbage 

 not tom'entose nor conspicuously cinereous : Atlantic United States species, one of them reach- 

 ing the Rocky Mountains. 



■t- Stems glabrous and very smooth or merely scabrous, leafy: leaves narrowly to broadly lanceo- 

 late: chaff of receptacle entire, merely mucronate. 

 H. PloridanUS, Gray. Stem from 2 to 6 feet high : leaves thinnish, bright green above, 

 sparsely hispidulous-scabrous, lanceolate, sparingly or obscurely denticulate, somewhat tripli- 

 nerved near the base, 2 to 4 inches long, 5 to 9 lines wide toward the base, often short-peti- 



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