Flat Top Four O'clock

Allionia corymbosa (Cav.) Kuntze ; Rev. Gen. 533. 1891
Mirabilis corymbosa Cav. Ic. 4: 55. 1797.
Calyxhymenia glabrifolia Ortega, Dec. 5. 1797.
Calymenia corymbosa Pers. Syn. PI. 1: 37. 1805.
Oxybaphus glabrifolius Vahl, Enum. PI. 2: 40. 1806.
Allionia corymbosa texensis Coult. Contr. U. S. Nat. Herb. 2: 351. 1894.
Allionia texensis Small, Fl. SE. U. S. 406. 1903.
Oxybaphus texensis Weatherby, Proc. Am. Acad. 45: 425. 1910.
Allionia cardiophylla Standley, Contr. U. S. Nat. Herb. 13: 405. 1911.
Oxybaphus cardiophyllus Weatherby, Proc. Am. Acad. 49: 492. 1913.
Stems few or solitary, erect or ascending, 3-10 dm. high, stout, simple or sparsely branched below, rarely suff rutescent, glaucous or glaucescent, glabrous or bifariously puberulent, usually puberulent or short-pilose at the nodes, the internodes elongate; petioles slender, 0.5-6 cm. long, glabrous; leaf-blades broadly cordate-ovate to elongate ovate^deltoid, 2-8 cm. long, 1-5.5 cm. wide, deeply cordate to truncate at the base and usually short-decurrent, obtuse or acute at the apex, entire or subsinuate, thick and succulent, green on the upper surface, often glaucous beneath, glabrous or obscurely puberulent; inflorescence cymose-paniculate, usually much branched, the branches slender, viscid-pilose with short fulvous hairs, the bracts few and very small, the involucres usually numerous, slender-pedunculate, viscid-pilose, about 4 mm. long at anthesis, 6-10 mm. long in fruit, the lobes short, rounded-oval; flowers usually solitary in the involucre, rarely 2 or 3, the perianth sparsely pilose, 6-10 mm. long, the limb 10-12 mm. broad; stamens 3, exserted; fruit broadly obovoid, 3.5 mm. long, darkgrayish,
glabrous, densely covered with short rounded tubercles; seed oval-obovoid, 2.5 mm. long, pale-brown.
Type locality: Mexico.
Distribution: Southwestern Texas and Coahuila to Hidalgo and Oaxaca.

Allionia corymbosa (Cav.) Kuntze, Rev. Gen. 533. 1891,
Mirabilis corymbosa Cav. Ic. 4: 55. 1797.
Calyxhymenia glabrifolia Ortega, Dec. 5. 1797.
Calymenia corymbosa Pers. Syn. PI. 1: 37. 1805.
Oxybaphus glabrifolius Vahl, Enum. PI. 2: 40. 1806.
Allionia corymbosa texensis Coult. Contr. U. S. Nat. Herb. 2: 351. 1894.
Allionia texensis Small, Fl. SE. U. S. 406. 1903.
Oxybaphus texensis Weatherby, Proc. Am. Acad. 45: 425. 1910.
Allionia cardiophylla Standley, Contr. U. S. Nat. Herb. 13: 405. 1911.
Oxybaphus cardiophyllus Weatherby, Proc. Am. Acad. 49: 492. 1913.
Stems few or solitary, erect or ascending, 3-10 dm. high, stout, simple or sparsely branched below, rarely suffrutescent, glaucous or glaucescent, glabrous or bifariously puberulent, usually puberulent or short-pilose at the nodes, the internodes elongate; petioles slender, 0.5-6 cm. long, glabrous; leafblades broadly cordate-ovate to elongate ovate^deltoid, 2-8 cm. long, 1-5.5 cm. wide, deeply cordate to truncate at the base and usually short-decurrent, obtuse or acute at the apex, entire or subsinuate, thick and succulent, green on the upper surface, often glaucous beneath, glabrous or obscurely puberulent; inflorescence cymose-pamculate, usually much branched, the branches slender, viscid-pilose with short fulvous hairs, the bracts few and very small, the involucres usually numerous, slender-pedunculate, viscid-pilose, about 4 mm. long at anthesis, 6-10 mm. long in fruit, the lobes short, rounded-oval; flowers usually solitary in the involucre, rarely 2 or 3, the perianth sparsely pilose, 6-10 mm. long, the limb 10-12 mm. broad; stamens 3, exserted; fruit broadly obovoid, 3.5 mm. long, dark-grayish, glabrous, densely covered with short rounded tubercles; seed oval-obovoid, 2.5 mm. long, pale-brown.
Type locality: Mexico.
Distribution: Southwestern Texas and Coahuila to Hidalgo and Oaxaca.

Allionia microchlamydea Standley, Contr. U. S. Nat. Herb
13: 405. 1911.
Stems mostly solitary, erect, 4-8 dm. high, simple or sparsely branched below the inflorescence, slender, glaucous below and glabrous, the internodes elongate; petioles slender, 0.5-3.5 cm. long, glabrous; leaf-blades narrowly deltoid-lanceolate or lance-deltoid, 3-7 cm. long, 0.6-1.5 cm. wide, obtuse or truncate at the base and abruptly short-decurrent, gradually narrowed to the obtuse apex, entire or sinuate-dentate, thick and succulent, green on the upper surface, glaucous or glaucescent beneath, glabrous; inflorescence cymose-paniculate,
A-
much branched, the branches slender, alternate, sparsely or densely viscid -pilose, the bracts minute, the involucres numerous, slender-pedunculate, about 2.5 mm. long at anthesis, 4-6 mm. long in fruit, viscid-pilose, the lobes rounded-oval; flowers solitary in the perianth; fruit broadly obovoid, 2.5-3 mm. long, dark-gray, glabrous, densely covered with coarse rounded tubercles; seed oval-obovoid, 2 mm. long, pale yellowish-brown.
Typ£ locality: In rocky soil near Ixmiquilpan, Hidalgo. Distribution: Stony hillsides, Queretaro and Hidalgo.

Allionia microchlamydea Standley, Contr. XL S. Nat. Herb
13: 405. 1911.
Stems mostly solitary, erect, 4-8 dm. high, simple or sparsely branched below the inflorescence, slender, glaucous below and glabrous, the internodes elongate; petioles slender, 0.5-3.5 cm. long, glabrous; leaf-blades narrowly deltoid-lanceolate or lance-deltoid, 3-7 cm. long, 0.6-1.5 cm. wide, obtuse or truncate at the base and abruptly short-decurrent, gradually narrowed to the obtuse apex, entire or sinuatedentate, thick and succulent, green on the upper surface, glaucous or glaucescent beneath, glabrous; inflorescence cymose-paniculate, much branched, the branches slender, alternate, sparsely or densely viscid-pilose, the bracts minute, the involucres numerous, slender-pedunculate, about 2.5 mm. long at anthesis, 4-6 mm. long in fruit, viscid-pilose, the lobes rounded-oval; flowers solitary in the perianth; fruit broadly obovoid, 2.5-3 mm. long, darkgray, glabrous, densely covered with coarse rounded tubercles; seed oval-obovoid, 2 mm. long, pale yellowish-brown.
Typb locality: In rocky soil near Ixmiquilpan, Hidalgo. Distribution: Stony hillsides, Queretaro and Hidalgo.