228 BOTANY. 



lower leaves ovate, often slightly cordate at base, upper ones lanceolate 

 undulate on margin; inflorescence paniculate; racemes few-flowered, termi- 

 nating the branches ; stamens 3, exserted ; fruit 5-angled or winged, club- 

 shaped ; flowering racemes short, but much elongated when in fruit (378 



a, Arizona, Loew). 



PHYTOLACCE^. 



Rivina* LiEvis, Linn. — Herbaceous above, sub-shrubby below, branch- 

 ing from the base; stem striate and with the leaves puberulent; leaves 

 broadly ovate or ovate-cordate, on slender petioles half their length; flowers 

 purplish; calyx-lobes ovate, as long as the four stamens ; anthers oblong ; 

 filaments thickish; style 1-2" long, somewhat curved; stigma capitate, 

 oblique, distinctly papillose. — In clefts of rocks, Southern Arizona (582). 



POLYGONACEiE, 



By Prof. T. 0. Poetee. 



Eriogontjm alatum, Torr. (Sitgreaves's Rep. p. 168, t. 8). — Perennial; 

 root stout and blackish ; stem erect, 1 to 3 feet high, arising from a short, 

 thick caudex, clothed with the remains of leaves, subflexuous, leafy; 

 branches alternate, erect, paniculate ; radical leaves spatulate or oblanceo- 

 late, 2 to 4 inches long, 3 to 5 lines wide, hirsute ; peduncles terminal, in 

 threes ; flowers yellowish ; involucre solitary, campanulate, 5-cleft ; peri- 

 gonia glabrous, segments equal ; achenia 4 lines long, winged nearly to the 

 base; wings broad, thin; seeds ovate, triangular. — Colorado, 1873, Wolf 

 (806); Willow Spring, Arizona, at 7,195 feet elevation, 1874, Rothrock 

 (204). 



Eeiogonum Jamesii, Benth — Stems 5 to 12 inches high, csespitose, 

 from a branched, few-leaved, woody caudex ; radical leaves spatulate-ovate 

 or narrowly lanceolate, cauline in verticils of 3 to 5, spatulate or oblong, 



* Rivina, Plum. — Flowers hermaphrodite, 3-bracted ; calyx 4-parted, the equal lobes sub- 

 corolline. Corolla none. Stamens 4-8, sub-hypogynous, the 4 exterior alternate with the lacinisB of 

 the calyx. Filaments filiform-subulate. Anthers ovate-cordate to narrowly oblong. One-celled ovary 

 simple, with a single amphitropons ovule fixed by the base. The longish style sublateral; capitate 

 stigma papillose ; sub-globose berry at length dry. Seed vertical, sub-globose or ovoid, the testa orusta- 

 oeous ; albumen central, mealy, surrounded by the ring-like embryo ; radicle descending ; cotyledons 

 membranaceous, exterior one larger and embracing the inner ; sub-shrubby [or, as in my species, rather 

 herbaceous, except at the slightly woody base]. Moquin, in DC. Prod. vol. 13, pars 2, p. 10. 



