82 PROCEEDINGS OF THE AMERICAN ACADEMY 



Pell^a Seemanni, Hook. Shaded rocky ledges in the mountains 

 about Guaymas. (226.) — P. Wrightiana, Hook. The form with 

 numerous pinnules (P. longimucronata, Hook.). Los Angeles Bay. 

 (554.) 



Indeterminable Species. 



179. Flowering specimens from a tree growing on sardy plains 

 about Guaymas, described as 12 to 15 feet high and 1 to 5 feet in 

 diameter, with very green bark and a dense symmetrical top. Its 

 wood is said to be useless even for fuel. The young branches are 

 finely pubescent, and the leaves are alternate, coriaceous, entire, linear 

 with a cordate base, obtuse, glabrous and veiny above, very strongly 

 reticulate-veined beneath, with a stout midnerve and the margins 

 revolute, about 3 inches long by 2 lines broad, the very short petiole 

 (a line long) jointed upon the stem ; stipules none. The flowers as 

 collected are in loose simple naked racemes 2 inches long, the scattered 

 spreading pedicels 2 or 3 lines long. They are probably dioecious, as 

 all those collected have only an imperfectly or scarcely at all developed 

 ovary. The calyx is .very small, 6-8-parted, apparently valvate ; 

 petals none; stamens about 20 (18-22) upon a prominent lobed 

 hypogynous disk (nearly equalling the calyx), the filaments distinct, 

 slender, 3 lines long, and the anthers short, basifixed, 2-celled, and 

 longitudinally dehiscent. The most fully developed ovaries are 

 smooth, oblong, somewhat obcompressed, 2-celled, with a nearly 

 sessile thick 2-lobed stigma, and apparently one or more (?) pairs of 

 collateral rudimentary ovules upon the axis. The relations of this 

 remarkable species are very obscure, and must await fuller material 

 for their determination. It will probably be found to belong to the 

 Tiliacece. 



307. " Yerba del ayre " ; foliage only of an unrecognized shrub, 

 found in ravines about Guaymas. A decoction of the leaves # is used as 

 a remedy for paralysis. 



2. Descriptions of some New Species of Plants, chiefly 

 Californian, with miscellaneous Notes. 



Silene Bernardina. Finely glandular-pubescent throughout ; 

 stems slender from slender rootstocks, a foot high, few-flowered : 

 leaves very narrowly linear-oblanceolate, 1 or 2 inches long: pedun- 

 cles slender, 1-3-flowered : calyx cylindrical, J- inch long, with oblong- 

 ovate teeth ; petals greenish, 8 lines long, the blade cleft to below the 



