Hemkonia. COMPOSITE. 307 



* Akenes rounded on the back and with a ventral angle, destitute or nearly so of basal stipe : 

 rays exserted but rather short: chaffy bracts none or hardi}- any among the inner floivcri: 

 leaves narrow, quite entire, or rarely a few salient deuticulations. (Ambiguous species, with the 

 habit, but not the akenes, of Mndin.) 



H. "Wheeleri, Gkat. Loosely branching, slender, green, slightly pubescent, minutely 

 glandular above : heads scattered : rays 5 or 6, bright yellow : marginal bracts of the recejj- 

 taele distinct. — Bot. Calif, i. 617; Rothrock in Wheeler Rep. vi. 361, t. 10. — Ulanche 

 Mountains, of the southern Sierra Xevada, California, Rothrock. 



H. citriodora. Simple-stemmed, with short-pedunculate corymbosely panicled heads, or 

 loosely branched above and heads more scattered, " lemon-scented," cinereously viUous-hir.sute 

 and above with small pedicellate glands interspersed : rays 8 or 9, greenish-yellow : marginal 

 bracts of the receptacle lightly united into a cup. — Madia citriodora, Greeue, BuU. Torr. 

 Club, ix. 63. — Northern California, from M~kiyou Co., Greene, to Placer and Sacramentu 

 Co., Bolunder (I8Gj), Mrs. Curran. With specimens from the latter a less villous and more 

 glandular form, Madia anomala, Greene, ined. 



* * Akenes obovate-triangular, with a dorsal and two lateral angles, the ventral face broad and 

 nearly plane, surface smooth and shinin^^, base usually extended into a small inflexed stipe, 

 with a whitish callous at its insertion (but sometimes the stipe short or obsolete and the callus at 

 the very base of the akene) : receptacle chaffy throughout : rays either white or light yellow in 

 the same species, opening only in bright sunshine. 



-i— Heads terminating paniculate or usually cor^'mbosely cymose branches. 



H. COngesta, DC. Soft-hirsute or villous, buL not lanate, slightly glandular toward the 

 clustered or scattered heads : bracts of tho involucre with lanceolate foliaceous tips, little 

 surpassed by the rays : marginal bracts of the receptacle either lightly connate or nearly 

 distinct: inflexed stipe of the akene conspicuous. — Prodr. v. 692; Gray, 1. c. (not of Pacif. 

 R. Rep. iv. 109, which proves to be young Lur/ojilii/lla). — California, near San Francisco, 

 Dotiijlas, G. R. Vaseif. Specimens formerly referred to this stiE little-known species belong 

 to the following. 



H. luzulsefolia, DC. Villous, and below even sericeous-lanate, at least when young, above 

 becoming very viscid-glandular and corymbosely or paniculately branched : lower leaves 

 elongated, 3-5-nerved: bracts of the involucre with short and broadish herbaceous tips: 

 marginal bracts of the receptacle united into a cup: rays 5 to 10, rather large, white, some- 

 times tinged with pink, or not rarely pale yellow (var. htescens, Greene, Bull. Torr. Club, 

 ix. 16) : stipe of akene as in the preceding, or shorter, or obsolete. — Prodr. 1. c. ; Gray, 1. c. 

 H. sericea. Hook. & Am, But. Beech. 356. H. rudis, Benth. Bot. Sulph. 31, a very branch- 

 ing and late-flowering form. — Dry open grounds, throughout western part of California, 

 verv common from San Francisco Baj- to Monterey. Varying greatly. 



^— -1— Heads disposed to be sessile along simple branches. 



H. Clevelandi, Gkeexe. Jlore slender, below villous with long spreading hairs, not lanate : 

 leaves all narrowly linear, mostly one-nerved : heads smaller, nearly all after the terminal 

 one subsessile in the axils or on short leafy branchlets, thus as it were spicately or race- 

 mosely disposed: ravs white: akenes and flowers as in the smaller-headed form of the 

 preceding. — BuU. Torr. Club, ix. 109. — California, from Jlendocino Co. (Kellorjg) to Lake 

 Co., Bolander, Cleveland. 



§ 2. HaetmXxxia, Gray, 1. c. Ear-akenes opaque and often rugose or 

 tuberculate (rarely smooth and shining), very gibbous, turgid, the terminal areola 

 from the summit of the inner angle or face, and hx gibbosity commonly iutra- 

 apical, raised on a little lieak (rostellum) or apiculation : flowers in all yellow : 

 our.; annuals. — Hartmonnia (excl. spec.) & part of Hemitonia, DC. Prodr. 



H. FP.rTtsrEVs. Gray, Proc. Am. Acad. xi. 70, & Bot. Calif, i. 361, an outlying species 

 from Guadalupe Island, off Lower California, is remarkable for haiTiig a woody-based stem, 

 and is probaldv the only species that is really perennial. This and 



H. Stheetsii, Gray, 1. c. xii. 162, from San Benito Island, Lower California, are the only 

 known representatives of the genus beyond the limits of this Flora. 



