202 COMPOSITAE. [ Franseria. 
alternate lobed or toothed leaves. Heads in axillary clusters or short 
(Spikes or racemes, the upper heads male, the lower female. 
About 4 widely dispersed species of uncertain, probably American origin. 
fl. X. strumarium, LZ. var. echinatum. — Unarmed, 1—3 ft. high. 
Leaves deltoid, ovate or somewhat cordate, obtuse, on long petioles of 
5—6', triplinerved, 3-lobed and coarsely dentate. Fruiting involucre ob- 
long, nearly 1‘ in length, with straight hooked prickles and stout incurved 
beaks, both a eee and beaks viscous-hispid at their bases. — Gray, 
Manual Bot. p. 212. — X. echinatum, Murr. — X. macrocarpum, DC. 
ocklebur, very ¢ n near Honolulu, carried over many parts of the ‘islands, 
The 
where vit burry fruits are s enien esome to horses and catile. Springs up after the first 
rains and dies off in summer. A v widely spread weed. 
11. FRANSERIA, Cavan. 
eads homogamous and unisexual, monoecious. Male heads many- 
flowered. Invol. bracts united into a 5—12-lobed herbaceous cup. Receptacle 
flat, naked or with filiform paleae. Corollas with very short, tube an 
campanulate 5-toothed limb. Anthers almost distinct, obtuse at the base, 
apiculate or setose at the inflected top! Style undivided. Female heads 
1—4-flowered, seyeral united into a glomerule, interspersed with bracts. 
Involucre united, and closed over oe achenes, 1—4-celled, 1—4-beaked 
at the top, and armed when ma with rien rows of prickles or 
spines. Corolla none. St cos biparti the branches exserted. 
Achenes without pappus, enclosed in the in ule te involucre or its cells. 
— Hairy herbs. Leaves alternate or the lowest opposite, cut-lobed or 
pinnately dissected. Heads small, inconspicuous, the male subsessile and 
nodding in terminal arr or racemes, the female sessile in the axils 0 
the rhein leave 
About 10 species, all hewn the W. coast of America. 
71. F. tenuifolia, Gray, in Pl. Fendl. . 80. — An erect annual, 1 to 
2 ft. high, canescent. Leaves pubescen oary underneath, twice oF 
thrice pinnatisect into linear segments vith smaller lobes interposed, the 
terminal segment longest. Male heads 10—20 flowered, greenish-yellow. 
Invol. 5—7-toothed, hispidulous. pace 5—6, subsessile. Female in- 
volucres 1—2’’ long when mature. 1-flowered in our specimens, with a 
1—2 toothed beak and 5—7 uncinate spinelets aa bracts) at the base; 
many involucres crowded into glomerules which are surrounded by and 
pea Ginuee with broad-oyate hispid bractlets. — Bot. Californ. I, 346- 
Gregarious in Ewa and Punahou, Oahu! Has a heavy scent like 
ipher pe A oe importation from Mexico or Lower California; was first observed 
