'0 



EUPHORBI ACE.E. A rgyihamnia. 



2. A. sericophylla, Gray in herb. Perennial, shruLby at base, with slender 

 virgate brandies, appressed silky-villous : leaves narrowly lanceolate, acuminate, 

 abo^ut 9 lines long : racemes axillary, very short and few-flowered : sepals 1 to 1 1 

 lines long, linear, acuminate, equalling the narrow acuminate hairy petals : glands 

 sliort, broad at base, narrowly acuminate above: stamens 6 to 10: capsule hairy: 

 seeds a line in diameter, reticulate, the broad ridges rugose. 



On the Verde River, Arizona {Br. Smart) ; Big Canon of the Tantillas Mountains, Lower Cali- 

 fornia, Palmer. 



4. BERNARDIA, P. Browne. 



Flowers diacious or monoecious, in small spicate or racemose clusters, mostly 

 axillary, apetalous and without involucre. Staminate calyx valvate, 3-5-parted. 

 Stamens 3 to 20, distinct, on a central sometimes glanduliferous receptacle ; anthers 

 erect in the bud. Pistillate calyx usually 6- (sometimes 3- or 9-) parted, imbricate. 

 Ovary 3-celled, 3-ovuled : stigmas nearly sessile, stout, 2-lobed or -j^arted, the lobes 

 lacerate or papillose. Seeds not carunculate. — Mostly shrubs or undershrubs, pubes- 

 cent with stellate or simple hairs ; leaves alternate, 2-stipulate, mostly serrate. 



A tropical American genus of 20 species or more ; only the following found within the United 

 States. 



1. B. myriCcefolia, Watson. An irregularly branclied shrub, 3 to 10 ft-et 

 hia-h, grayish green throughout with a dense fine stellate pubescence : leaves thick 

 and reticulate-veined, oblong to ovate-oblong, usually obtuse, cuneate to cordate at 

 base, from 3 to 6 lines to 2 inches long, often small, repandly dentate, on very 

 short petioles: flowers dioecious; the staminate very small, in axillary racemose 

 clusters ; pistillate terminal, sessile : calyx 3- (rarely 4-) parted : stamens 3 to 20, 

 alternate with minute glands: ovary tomentose : stigmas very short, papillose: 

 seed 3 lines long, nearly smooth, dull, slightly carinate. — 2'i/ria viyriccpfolia, 

 Scheele in LinntBa, xxv. 581 ; Torrey, Bot. Mex. Bound. 201. RicineUa myricce- 

 folia, Mull. Arg. in DC. Prodr. xvl 729. 



On the headwaters of the Mohave (Parry & Lemmun) ; San Felipe (Parry) ; frequent in New 

 Mexico and W. Texas, and in Northern Mexico. In habit resembling closely the other species 

 referred by Miiller to Bernardia § Tyria., from which there seems to be no good reason for sepa- 

 rating it. 



5. ACALYPHA, Linn. 



Flowers monoecious, in the axils of wholly glandless bracts, spicate; the staminate 

 very small, in ament-like spikes, with the few or solitary pistillate ones at the base 

 or sometimes separate : involucre, petals and disk none. Staminate calyx 4-parted, 

 valvate ; the pistillate 3 - 5-parted and slightly imbricate. Stamens usually 8, dis- 

 tinct, on a central raised receptacle ; filaments short ; anthers long, erect in the bud, 

 versatile, the cells separate and somewhat vermicular. Ovary 3-celled, 3-ovuled : 

 styles 3, usually finely dissected or fringed, and red. Capsule often surrounded by 

 the enlarged bract. Seed smooth or roughened or pitted. Eadicle about equalling 

 the OA^ate cotyledons. — Shrubs or undershrubs, or often perennial or annual herbs ; 

 leaves alternate, toothed, 2-stipulate. 



A genus of all tropical regions, of over 200 species, very largely American but sparingly repre- 

 sented in tlie United States ; half a dozen or more species, annual or perennial herbs, are found 

 in the Atlantic and Southern States and near the Mexican border. 



1. A. Californica, Benth. A .shrub, with spreading rigid branches and brown- 

 ish bark, puberulent on the young twigs : leaves ovate, somewhat cordate, acute, 

 finely toothed, 3 - 5-nerved at base, finely and densely pubescent when young, at 



