352 
Sweet.)—From San Antonio northward and westward. Var. Cervantes Lag.,, 
extending from Texas to New Mexico and Mexico, has viscid-pubescent or villous 
branches and involucre, and much smaller and thicker leaves cordate or subcordate 
at base. Var. LATIFOLIA Gray, extending from Texas and New Mexico to Wisconsin, 
has a glabrous or glabrate involucre, and ovate or cordate submembranaceous 
leaves. 
5. A. albida Walt. Nearly glabrous, except the inflorescence: leaves all sub- 
sessile, lanceolate or oblong-lanceolate, acute at base: fruit more hirsute than in the 
last, muriculate along or between the ribs. (Oxybaphus albidus Sweet.)—From the 
Chenate Mountains northward and eastward to Harris County, 
6. A. hirsuta Pursh. More or less glandular-hirsute, especially about the nodes 
and the usually contracted inflorescence, 3 to 9 dm. high: leaves lanceolate to linear- 
lanceolate, sessile and cuneate at base or narrowed to a short petiole; stamens often 
5: fruit with thickened obtuse angles. (Orybaphus hirsutus Sweet.)—From the 
tributaries of the Red River to the Limpia. 
. A. angustifolia (Nutt.) Kuntze. Often tall, glabrous, except the more or less 
hirsute peduncles and involucres; leaves linear, thiek and glaucous, often elongated 
(5 to 15 em. long): fruit as in the last. (Oxybaphus angustifolius Sweet.)—lrom Tom 
Greene County northward and southwestward to the border. 
3. WEDELIA Leefl. (1758.) 
Annual or perennial herbs, with opposite very unequal leaves, axil- 
lary pedunculate flowers, deeply 3-lobed 3-flowered involucre, perianth 
with an oblique 4 or 5-lobed limb, usually 3 stamens, and an ovate 
compressed fruit surrounded by a rigid winged margin, smooth and 
convex on the inner side and with a double line of tubercles on the 
back. (Allionia L., 1759.) 
1. W. incarnata (L.) Kuntze. Stems slender, branching, prostrate: pubescence 
viscid, short or floccose: leaves ovate: lobes of the involucre concave, acute: perianth 
rose-colored or white, (Allionia incarnata L.)—Common on sandy river-banks and 
in valleys from the Staked Plains westward, and southward to Brazos Santiago. 
4. NYCTAGINIA Chois. 
Annual and prostrate herbs, with glandular pubescence, opposite 
leaves, many-bracted (many-flowered) involucre, tubular funnelform 
perianth with entire lobes, 5 long-exserted stamens equaling the style, 
sinall capitate stigma, and fruit as in Mirabilis. 
1. N. capitata Chois. Leaves triangular-acuminate, undulate, attenuate into 
the petiole: involucre of 8 to 12 linear-lanceolate very acute bracts (8 to 12 em. 
long): calyx villous, red, 2.5 em. long, the limb plicate.—From Duval County to 
the Rio Grande, and northw ard to the Staked Plains, 
5. ABRONIA Juss. 
Low herbs (usually more or less viseid- pubescent), with thick oppo- 
site petioled unequal leaves, axillary or terminal peduncles, numerous 
showy and. sessile flowers in a solitary head, salverform perianth with 
obcordate lobes, elongated calyx-tube with limb of 5 (or 4) segments, 
5 unequal and included stamens adnate to the tube, and a coriaceous or 
indurated 1 or 2-winged fruit which incloses a smooth cylindrical 
achene, 
