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PROCEEDINGS OF THE AMERICAN ACADEMY 



species, to Mueller's Gymnostillingia, which may be considered a 

 section or subgenus, characterized by solitary staminate flowers, the 

 pistillate ones naked, and the seed without caruncle. 



Stillingia paucidentata. Differing from the last in its stout 

 angled stems branching above ; leaves acuminate, an inch or two long, 

 with 2 or 3 setaceous teeth on each side near the base ; spikes stouter 

 and denser, the pistillate flowers more crowded ; capsule larger, with 

 more prominent gynophore, and the larger seed oblong-ovate, slightly 

 carunculate. — Colorado Valley, near mouth of Williams River ; Dr. 

 E. Palmer (n. 517, 1876). 



Stillingia Torretana. A low glabrous annual (?), with angled 

 leafy stems : leaves oblong-obovate, cuneate at base, rounded above, 

 obscurely veined, acutely and sometimes doubly toothed, G to 10 lines 

 long, with minute fimbriate caducous stipules : spikes terminal, sessile, 

 short and slender : bracts very small, ovate, acute, 1 -flowered, with 

 nearly sessile disk-like glands : staminate calyx campanulate, diandrous, 

 the pistillate of 3 triangular sepals : capsule over 2 lines broad, with 

 stout gynophore: seeds oblong-ovoid, \\ lines long, smooth, with con- 

 spicuous prominent caruncle. — Valley of the Rio Grande, at Eagle 

 Pass ; Dr. Bigelow, 1852. Sapium annuum, var. dentatum, Torr. in 

 Bot. Mex. Bound. 201, and referred doubtfully by Mueller to Sebas- 

 tiana Treculiana. The latter, from the same region and mucli re- 

 sembling the present species, is distinct though doubtless a congener. 

 It is described as a perennial, 1 toll feet high, with a woody base. 

 Its leaves are oblanceolate, acutish, 10 to 15 lines long ; the capsule 

 somewhat smaller, with a short stout-horned gynophore and large 

 persistent central column; the seed smaller, subglobose, irregularly 

 tuberculate, and with much smaller caruncle. 



Callitriche sepulta. Terrestrial, prostrate and rooting, with 

 numerous narrowly linear leaves 2 or 3 lines long : bracts none : fruit 

 broader than long, emarginate at each end, the thick carpels with 

 acute divergent margins, on stout pedicels a line or two long, soon 

 deflexed and buried in the soil : styles elongated, reflexed, soon 

 deciduous. — Oregon ; E. Hall (n. 459). Allied to C. deflexa, 

 A. Braun (C. Austini, Engelm.), and to C. Nuttallii, Torr., of which 

 the latter has the same habit of burying its fruit. 



Ephedra Nevadensis. An erect shrub, 2 feet high or more, 

 with opposite erect or somewhat diffusely spreading branches ; bark 

 splitting and becoming white and shreddy or fibrous : scales opposite, 

 sheathing, with short acute lobes or somewhat elongated foliaceous 

 tips, usually 1 to 3 lines long, at length mostly deciduous : staminate 



