sriTGENESIA. XECESSAEIA. 185 



Species. \. G. stolonifera? Hippia stohnifera, Versoonf 

 % p. 497. Hab. Commonly difFused over the mantimt- 

 parts of South Carolina. S. Elliott, Esqr. Obs. Smooth; 

 stem repent; leaves setaceously pinnatifid; flowers sessile 

 to the root. . 



A small genus of 3 species, 1 indigenous to the Cape of 

 Good Hope and another to India; the above is also com- 

 mon to Portugal. 



602. IVA. L, 



Calix about 5-Ieaved^ or 5-parted. Feminine 

 florets of the ray 5, naked. Receptacle setosely 

 paleaceous. Seed obovate, naked. 



Herbaceous or shrubby; leaves 3-nerved, mostly carne- 

 ous, opposite and alternate; flowers spiked orpaniculated, 

 axillar and terminal. 



Species. 1. I. ciliata. 2. * Xanthlfolia. Annual; leaves 

 opposite, petiolate, cordate-ovate, acuminated, doubly ser- 

 rate, softlv villous, beneath canescent; spikes paniculated, 

 naked; calix 5-cleft. Hab. In arid soils, near Fort Alan- 

 dan, &c. on the banks of the Missouri. Obs. Plant very 

 large, 5 or 6 feet high, with leaves nearly of the size and 

 form of Xanthhim Strumarium, but covered with a soft 

 and almost velvet-like villus; upper leaves ovate; flowers 

 extremely numerous, in a diffuse panicle. Cahx 5-cleft, 

 divisions ovate-lanceolate, acuminate. Style of the discal 

 florets simple; stigma subcapltate. Fertile florets 5, na- 

 ked. Receptacle subsetaceous. — Flowering in August. 



3. imbricata^ Calix imbricated; scales coriaceous, white- 

 ish, 5 or 6. Feminine florets, apetalous, style long, 

 minutely sheathed at the base. Uadical and younger 

 leaves opposite and serrated; floral and upper stem leaves 

 alternate and entire. 



^.axillaris. Ph. Obs. Perennial and herbaceous; 6 to 

 12 inches high and smooth; leaves mostly opposite, cu- 

 neate-oblong, obtuse, 3-nerved, very entire, margin subci- 

 liate, scabrous; flowers axillary, solitary and nutant; yel- 

 lowish-green. Feminine florets, apetalous; receptacle 

 subsetosely foliaceous. Style of the discal florets simple, 

 stigma subpeltate, fringed. Hab. \\\ arid and saline soils 

 on the banks of the Missouri. Flowering in May. 5. fru- 

 tesceiis Called Marsh-Elder. 



A Xorth American genus with the exception of T. annua 

 indigenous to the tropical regions of the same continent 



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