224 NORTH AMERICAN FLORA [VoLumME 21 
slender-pedunculate, 4-5 mm. long in anthesis, in age 10-18 mm. long, densely or sparsely 
viscid-pilose, the lobes broad, rounded or obtuse; perianth 8-10 mm. long, sparsely pilose, 
pink; stamens 3-5, long-exserted; fruit obovoid, 4-5 mm. long, dark-olivaceous, densely short- 
pilose, the angles broad, smooth or nearly so, the sides rugose or short-tuberculate; seed obo- 
void, 3 mm. long, brownish-stramineous. 
Type Locality: “Upper Louisiana.” 
DisTRIBUTION: Dry fields and hillsides, Wyoming to Manitoba and Wisconsin, southward to 
Missouri, Texas, and New Mexico; rarely adventive eastward. 
ILLUSTRATIONS: Britt. & Brown, Ill. Fl. f. 1418; ed. 2, f. 1728. 
12. Allionia pauciflora (Buckl.) Standley. 
Oxybaphus pauciflorus Buckl. Proc. Acad. Phila, 1862: 7. 1862. 
Allionia gigantea Standley, Contr. U. S. Nat. Herb. 12: 348. 1909. 
Oxybaphus giganteus Weatherby, Proc. Am. Acad. 49: 492. 1913, 
Stems solitary or few, 5-15 dm. high, erect or decumbent, very stout, simple or sparsely 
branched below the inflorescence, green or glaucescent, densely puberulent throughout, the 
internodes usually short; petioles 5 mm. long or shorter, very stout, most of the leaves sessile; 
leaf-blades ovate-oblong to rhombic-ovate, ovate-deltoid, or rounded-ovate, 3.5-10 cm. long, 
1.5-7.5 cm. wide, subcordate or rounded at the base and often abruptly short-decurrent, 
rounded or obtuse at the apex, entire or subsinuate, bright-green, or glaucescent beneath, 
thick and succulent, densely puberulent or sometimes glabrate; inflorescence paniculate, 
copiously or sparsely branched, the branches slender or stout, opposite, densely viscid-puberu- 
lent or short-pilose, bearing few or numerous reduced bractlike leaves; involucres slender- 
pedunculate, mostly 3-flowered, about 4 mm. long at anthesis, 8-12 mm. long in fruit, densely 
or sparsely pilose, the lobes short, rounded; perianth about 8 mm. long, pale-pink, short- 
pilose, the limb about 12 mm. broad; stamens 3-5, long-exserted; fruit obovoid, 4-5 mm. 
long, dark-olivaceous, hirtellous, the angles broad, coarsely tuberculate or composed of large 
distinct tubercles, the sides also tuberculate; seed obovoid, 3 mm. long, brownish-stramineous. 
TYPE LOCALITY: On the San Saba River, north of Fort Mason, Texas. 
Distrrrution: Oklahoma and Texas. 
13. Allionia albida Walt. Fl. Car. 84. 1788. 
Calymenia albida Nutt. Gen. 1: 26. 1818. 
Oxybaphus albidus Sweet, Hort. Brit. 2: 429. 1827. 
Calymenia granulata Raf. Aut. Bot. 15. 1840. 
Oxybaphus ceo Choisy, in DC. Prodr. 13?: 433, in part. 1849. Not O. angustifolius 
Sweet. 2 
Mirabilis nyctaginea albida Heimerl, Beitr. Syst. Nyct. 22. 1897. 
Mirabilis albida Heimerl, Ann. Cons. Jard. Genéve 5: 182. 1901. 
Mirabilis albida uniflora Heimerl, Ann. Cons. Jard. Genéve 5: 182. 1901. 
Allionia bracteata Rydb. Bull. Torrey Club 29: 690. 1902. 
Allionia decumbens Rydb. Bull. Torrey Club 29: 692. 1902. Not A. decumbens Spreng. 1825. 
Allionia lanceolata Standley, Contr. U. S. Nat. Herb. 12: 355, in part. 1909. Not A. lanceolate 
Rydb 
Allionia lanceolata uniflora Standley, Contr. U. S. Nat. Herb. 12: 355. 1909. 
Stems solitary or few, 2-12 dm. high, erect or decumbent, stout or slender, simple or 
sparsely branched below the inflorescence, glaucous or glaucescent, glabrous or bifariously 
puberulent, the internodes elongate or often very short; petioles 5 mm. long or shorter, stout, 
usually wanting; leaf-blades mostly narrowly lanceolate, sometimes linear to ovate, 4.5~10 
em. long, 0.3-2.8 cm. wide, acute to long-attenuate at the base, gradually narrowed to the ob- 
tuse or acutish apex, entire or subsinuate, usually thick and succulent, bright-green, or often 
very glaucous beneath, glabrous or very sparsely short-pilose; inflorescence often wholly of 
axillary involucres in young plants, in mature plants cymose-paniculate, copiously branched, 
the branches slender or stout, opposite or alternate, puberulent or shortly viscid-pilose, often 
bearing very numerous reduced bractlike leaves; involucres 1~3-flowered, slender-pedunculate, 
about 4 mm. long at anthesis, 8-14 mm. long in fruit, densely or sparsely viscid-pilose, the 
lobes short, rounded; perianth 8-10 mm. long, pale-pink, sparsely pilose; stamens 3-5, exserted; 
fruit obovoid, 5 mm. long, dark-olivaceous, short-hirtellous, the angles broad and coarsely 
