144 PROCEEDINGS OF THE AMERICAN ACADEMY 



(n. 2849 Pringle, 1889). Remarkable for its numerous crowded 

 small white flowers. 



OxALis Madrensis. Stems low and decumbent, from slender 

 running rootstocks, branching, pubescent throughout • leaflets obo- 

 vate, obtuse or usually slightly emarginate, equally short-petiolulate, 

 ^ inch long or less : peduncles axillary, slender, about equalling or 

 exceeding the leaves, bibracteate, 1-flowered : sepals thin and sub- 

 petaloid, purplish, ciliate, oblong-lanceolate, obtuse, 3 or 4 lines long; 

 petals yellow, 5 lines long : stamens all equalling the styles : capsule 

 not exceeding the sepals: seeds few, finely 10-costate, the ribs acutely 

 tuberculate. — In the mountains near Monterey; July, 1889 (n. 2867). 

 Allied to 0. Berlandieri. 



SARGENTIA; new genus of Hutacece (Xanihoxi/lece). Flowers 

 perfect, or ovary sometimes abortive. Calyx small, 5-parted. Petals 

 5, imbricate, orbicular, spreading. Stamens 5, at the base of a thick 

 lobed hypogynous disk. Ovary very deeply 5-lobed, sessile upon the 

 disk. Style central, simple ; stigma small, entire. Fruit an oblong- 

 obovoid drupe (or double, the two parts coherent by the inner face), 

 with fleshy epicarp and thin crustaceous endocarp. Seed solitary, 

 attached by a long hilum to the inner angle, exalbuminous. Coty- 

 ledons flat and thick ; radicle superior, very short. — A small tree, 

 with alternate palmately 3-foliolate evergreen leaves, and small flowers 

 in narrow axillary and terminal panicles. 



S. Greggii. Leaflets shortly petiolulate, oblong-obovate, obtuse 

 or acutish, 1 to 3 inches long, glabrate, the petioles and nerves mi- 

 nutely puberulent : panicles shorter than the leaves, tomentulose : 

 sepals orbicular ; petals a line long, exceeding the stamens : fruit 

 yellow, 9 lines long. — First collected by Dr. Gregt;^ near Monterey 

 in flower, in February, 1847, ticketed as " Chapote amarillo" and 

 described as bearing a small edible fruit. It occurs abundantly in 

 the canons about the base of the mountains surrounding Monterey as 

 a large shrub or small tree with smooth gray bark, which cleaves off 

 much as in Platanus. It was collected by Mr. Pringle in fruit in 

 June, 1888, and in 1889 in flower (n. 2416). The generic name is 

 given in recognition of the botanical services of Prof. C. S. Sai'gent, 

 Director of the Arnold Arboretum, through whose assistance Mr. 

 Pringle lias been enabled to successfully prosecute his explorations in 

 northern Mexico. 



Amyris Madrensis. Very finely and somewhat densely pubes- 

 cent, with slender branches leaves pinnate, 2 or 3 inches long; 

 leaflets 2 to 4 pairs, thick, dark green, very shortly petiolulate, 



