452 NTCTAGINACEAE 



(Contrib. U. S. Nat. Herb. 12: 303-389, — 1909); AUioniaceae of Mexico and Central America 

 (1. c. 13: 377-430,-1911). 



Flowers without an involucre, each pedicel bearing or subtended by 1 to 3 small bracts. 

 Calvs campanulate or funnelform, mostly reddish or purplish. 



" Fruit 5-angled or .5-ril)bed '. 1. Boerh.vavia. 



Fruit globose, smooth 2. Hermidium. 



Calyx salver-shaped with very much elongated tube, white 3. Acleisanthes. 



Flowers subtended by an involucre. 



Involucral bracts distinct or nearly so; fruit usually winged. 



Bracts 5 or more, wholly distinct; fruit without glands 4. Abboxia. 



Bracts 3, distinct nearly to base; fruit with 2 rows of glands 5. Wedeliella. 



Involucre composed of more or less united bracts; fruit not winged. 



, Fruit 5-ribbed; involucre enlarged in fruit 6. Allionia. 



Fruit mostly smooth; involucre unchanged in fruit 7. MiE.iBiLis. 



1. BOERHAAVIA L. 



Slender herbs with glandular rings about the internodes. Blades of the 

 opposite leaves unequal. Bracts minute, 1 to 3 to each flower. Flowers small, 

 on jointed pedicels. Calyx campanulate or funnelform, 5-lobed. Stamens 1 

 to 5; filaments slender, united at base. Stigma shield-shaped. Fruit club- 

 shaped to obpyramidal, 3 to 5 (or 10) -ribbed, or -angled, or narrowly winged. 

 — Species 50, all continents. (H. Boerhaave, 1668-1738, famous Dutch physi- 

 cian and botanist, professor at Leiden.) 

 Calyx campanulate; fruit .5-ribbed. 



Annual ; fruit glabrous 1. B. intermedia. 



Perennial; fruit glandular-viscid 2. B. hirsuta. 



Calyx funnelform; fruit obscurely 10-ribbed 3. B. annulata. 



1. B. intermedia Jones. Low, spreading or ascending, the stems almost 

 filiform-slender, ■'^4 to 1^4 f^^t long: leaves elliptic to lanceolate, obtuse or 

 acute ; peduncles bearing 2 to 5 umbellate or subcapitate flowers ; calyx 1 line 

 long ; fruit cuneate or short-clavate, 1 to IV:^ lines long. 



Southwestern Colorado Desert {Orcutt 2090 ace. Standley), east to Texas 

 and south into Mexico. 



Refs. — BOERHAAVIA IXTERMEDIA .lones, Contrib. 10: 41 (1902), type loc. El Paso, Tex., 

 Jones 417.'?; Stand. Contrib. U. S. Nat. Herb. 12: 3S2 (1909). 



2. B. hirsuta Willd. Stem branching, 2 or 3 feet long, parts or some of 

 the internodes and petioles sparseh' hirsute-glandular; leaves round-ovate, 

 mostly obtuse or some acutish, rounded at base, i-. to 2 inches long; flowers 

 nearly sessile in small clusters terminating slender peduncles, the peduncles 

 more or less divaricate in a loose panicle; calyx red, 1 line long; fruit 1 to 

 2 lines long, 5-ribbed. 



San Jacinto Valley and Coyote Caiion (Southern California), east to Arizona 



and Mexico. 



Refs.— BoERH.\AviA HIRSITA Willd. Phvt. 1 (1794); Stand. Contrib. U. S. Nat. Herb. 12: 

 382 (1909). 



3. B. annulata Cov. Perennial: stem stout, erect from an ascending base, 

 glabrous, glaucous, 1 to 3 feet high, the middle of each internode usually with 

 a reddish mucilaginous ring ; leaves ovate-oblong, cordate or rounded at base, 

 obtusish at apex, thick, rigid, fleshy, entire or sometimes "lacerate," 1 to 2 

 inches long, hirsute; petiole nearly as long as blade; flowers 3 to 4 lines 

 long, in small clusters terminating the branches; stamens 3. and with the style, 

 conspicuously exserted; fruit turbinate, glabrous, obscurely 10-ribbed, 21/0 

 lines long. 



Death Valley region. 



Eefs. — BoERHA.\vi.\ .VXNULATA Cov. Contrib. V. S. Nat. Herb. 4: 177, pi. 18 (1893), type loc. 

 Furnace Creek Canon. Funeral Mts., Coville 577. Aiiulocaulis annulatus Stand. Contrib. 

 XT. S. Nat. Herb. 12: 375 (1909). 



