70 EUPHORBIACE^E. Argythamnia. 



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

 virgate branches, appressed silky-.villous : leaves narrowly lanceolate, acuminate, 

 about 9 lines long: racemes axillary, very short and few-flowered: sepals 1 to 1| 

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

 short, 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 (Dr. Smart) ; Big Canon of the Tantillas Mountains, Lower Cali- 

 fornia, Palmer. 



4. BERNAKDIA, P. Browne. 



Flowers dioecious 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 -parted, 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. myricaefolia, Watson. An irregularly branched shrub, 3 to 10 feet 

 high, 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. Tyria myricwfolia, 

 Scheele in Linnsea, xxv. 581 ; Torrey, Bot. Mex. Bound. 201. Ricinella myricce- 

 folia, Mull. Arg. in DC. Prodr. xv 2 . 729. 



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

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

 referred by Miiller to Bcrnardia 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, arid red. Capsule often surrounded by 

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

 the ovate cotyledons. Shrubs or undershrubs, or often perennial or annual herbs ; 

 leaves alternate, toothed, 2-stipulate. 



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

 sented in the 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. Calif ornica, 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 



