410 PROCEEDINGS OF THE AMERICAN ACADEMY 



heads in a large loose panicle, few-flowered, the flowers shortly pedi- 

 cellate, glabrous: petals greenish, a line long: stamens very numerous, 

 white. Tequila, on the sides of ravines. (539.) — Stipules wanting 

 in the specimens; fruit unknown. A peculiar species, belonging to 

 the A. Roemeriana or perhaps to the A. grandistipula group. 



Lysilgjia Acapulcensis, Benth. A shrub, 12 feet high, with 

 white fragrant flowers. Rio Blanco, in deep ravines; June. (31.) 



Lysiloma(?), sp. A small tree, 2 or 3 inches in diameter, with 

 slender branches, puberulent : stipules narrowly semicordate to lan- 

 ceolate, acuminate, pubescent, 2 or 3 lines long ; pinnae 8 to 10 pairs ; 

 leaflets about 40 pairs, linear-oblong, 1 to 2^ lines long, glabrous : 

 peduncles slender, an inch long or more • heads small : calyx puberu- 

 lent ; corolla cleft to the middle : stamens white. Barranca. (88). — 

 As the fruit is wanting the species may belong to Pithecolobiiim, near 

 P. parvifolium. Except in its finer and closer pubescence it much 

 resembles a species collected by Mr, Pringle in the Rincon Mouptains, 

 Arizona, doubtfully referred to Pithecolobium. 



Calliandra HUMiLis, Benth. Rather unusually hirsute ; stamens 

 white, becoming pinkish. Rio Blanco, on hill-tops under pines. (174.) 



Calliandra tetragona, Benth. A large shrub with many 

 stems, about 12 feet high, with an abundance of white bloom ; culti- 

 vated, and known as "Potosina." Guadalajara; October. (635.) 



Calliandra (Racemose) nitida. A small shrub, 2 feet high, 

 subtomentose-pubescent : stipules short, lanceolate; pinnce 7 to 10 

 pairs; leaflets 15 to 25 pairs, loosely tomentose both sides, somewhat 

 ferruginous beneath, dark gray and becoming glabrous and shining 

 above, oblong, subfalcate, obtuse or obtusish, a line long : peduncles 

 fascicled in the axils of short bracts, an inch long or more, few-flow- 

 ered : calyx very short ; corolla 3 or 4 lines long, narrowly tubular, 

 cleft nearly to the middle, appressed-pubescent, reddish: stamens red, 

 an inch long. Rio Blanco, in deep ravines; July. (178.) 



Calliandra (Racemose) Palmeri. Suffruticose, with rarely 

 more than a single stout flowering stem 3 to 5 feet high, hoary with a 

 rather dense spreading pubescence: leaves large; pinnce about 15 

 pairs ; leaflets 40 to GO pairs, narrowly oblong, subfalcate, acute, about 

 3 Hues long, loosely pubescent beneath, glabrous dark gray and sliin- 

 ing above: heads few-flowered, racemose on very short peduncles (a 

 line, becoming 2 or 3 lines long in fruit): calyx and corolla thick and 

 firm, white-sericeous, the campanulate repandly toothed calyx 3 or 4 

 lines long ; corolla cleft nearly to the base, 7 to 9 lines long: stamens 

 nearly 3 inches long: pods densely subtomentose-pubescent, 4 or 5 



