Smooth Four O'clock

Allionia exaltata Standley, Contr. U. S. Nat. Herb. 12: 355
1909.
Oxybaphus exaltatus Weatherby, Proc. Am. Acad. 49: 492. 1913.
Stems few or solitary from a stout woody root, erect, about 15 dm. high, stout, glabrous, glaucescent below, simple or sparsely branched below the inflorescence, the internodes elongate ; petioles stout, 3-10 mm. long, glabrous; leaf-blades elliptic-lanceolate or lanceolate, 4.5-7 cm. long, 0.7-2 cm. wide, acute at the base and apex, entire or subsinuate, thick and succulent, often glaucous or glaucescent beneath, glabrous; inflorescence a large open panicle, much branched, the branches slender, ascending, glabrous or very sparsely short-pilose with viscid hairs, the peduncles slender, elongate, short-pilose or glabrous, the involucres 3-4 mm. long at anthesis, 10-12 mm. long in fruit, sparsely short-pilose or glabrous, the lobes short, rounded; flowers usually 3 in each involucre; fruit obovoid, 4.5 mm. long, brownish, glabrous, the angles acute, narrow, smooth, the sides transverse-rugulose ; seed obovoid, pale yellowish-brown.
Type locality: Cimarron Valley, Cherokee Outlet, Oklahoma. Distribution: Oklahoma.

Allionia exaltata Standley, Contr. U. S. Nat. Herb. 12: 355
1909.
Oxybaphus exaltatus Weatherby, Proc. Am. Acad. 49: 492. 1913.
Stems few or solitary from a stout woody root, erect, about 15 dm. high, stout, glabrous, glaucescent below, simple or sparsely branched below the inflorescence, the internodes elongate; petioles stout, 3-10 mm. long, glabrous; leaf-blades elliptic-lanceolate or lanceolate, 4.5-7 cm. long, 0.7-2 cm. wide, acute at the base and apex, entire or subsinuate, thick and succulent, often glaucous or glaucescent beneath, glabrous; inflorescence a large open panicle, much branched, the branches slender, ascending, glabrous or very sparsely short-pilose with viscid hairs, the peduncles slender, elongate, short-pilose or glabrous, the involucres 3-4 mm. long at anthesis, 10-12 mm. long in fruit, sparsely short-pilose or glabrous, the lobes short, rounded; flowers usually 3 in each involucre; fruit obovoid, 4.5 mm. long, brownish, glabrous, the angles acute, narrow, smooth, the sides trans verse-rugulose ; seed obovoid, pale yellowish-brown.
Type locality : Cimarron Valley, Cherokee Outlet, Oklahoma. Distribution: Oklahoma.

Allionia carletoni Standley, Contr. U. S. Nat. Herb. 12: 355
1909.
Oxybaphus hirsutus Holz. Contr. IT. S. Nat. Herb. 1: 213. 1892. Not O. hirsutus Sweet, 1825. Oxybaphus nyctagineus pilosus Holz. Contr. U. S. Nat. Herb. 1: 213. 1892. Not 0. nyctagineus
pilosus A. Gray, 1859. Oxybaphus Carletoni Weatherby, Proc. Am. Acad. 49: 492. 1913.
Stems few or solitary, erect, 6-12 dm. high, stout, glaucous below, simple or sparsely branched below the inflorescence, densely viscid-pilose with short slender fulvous hairs; leaves sessile or subsessile, the very stout broad petioles 4 mm. long or shorter, the blades broadly deltoid-ovate to ovate or ovate-oblong, 4—8 cm. long and 1-4 cm. wide, or larger, subcordate to obtuse at the base, narrowed to the obtuse or acute apex, entire or subsinuate, thick and succulent, green, or often glaucous beneath, densely short-pilose with viscid hairs, or sometimes glabrate in age; inflorescence ample, paniculate, the branches stout, opposite, densely viscid-pilose, the bracts very small, the peduncles slender, elongate, the involucres 5-6 mm. long at anthesis, in age 12-18 mm. broad, densely viscid-pilose, the lobes broadly rounded; flowers usually 3 in each involucre, the perianth sparsely pilose, pink; stamens usually 3, exserted; fruit obovoid, 5 mm. long, brown, glabrous, the angles acute, narrow, smooth, the sides rugulose or obscurely tuberculate, conspicuously raphidulous; seed broadly obovoid, 3—3.5 mm. long, pale-brown.
Type locality: Barber County, Kansas. Distribution: Oklahoma and southern Kansas.

Allionia glabra (S. Wats.) Kuntze, Rev. Gen. 533. 1891
Oxybaphus glaber S. Wats. Am. Nat. 7: 301. 1873.
Oxybaphus glaber recedens Weatherby, Proc. Am. Acad. 45: 425. 1910.
Allionia glabra recedens Standley, Contr. U. S. Nat. Herb. 13: 406. 1911.
Stems few or solitary, erect, 8-15 dm . high, usually simple up to the inflorescence or with a few sterile branches below, stout, glaucous or glaucescent, glabrous; leaves distant, or crowded below, sessile, the blades linear, 5-12 cm. long, 2-7 mm. wide, long-attenuate to the base, gradually narrowed to the obtuse or acute apex, entire, thick and succulent, glaucous beneath, glabrous; inflorescence a loose terminal panicle 1-4 dm. long, much branched, the branches very slender, opposite, glabrous or sparsely short-pilose with viscid hairs; involucres slenderpedunculate, at anthesis about 3.5 mm. long, in age 12-15 mm. broad, viscid-pilose or glabrous and ciliate, shallowly lobed, the lobes ovate-orbicular, rounded at the apex; flowers usually solitary, sometimes 2, in the involucre, mostly cleistogamous, the perianth about 7 mm. long, white or pale-pink, glabrous; stamens 5, short-exserted ; anthocarp obovoid, about 5 mm. long, olivaceous, glabrous, the angles acute, narrow, smooth, the sides obtusely short-tuberculate or rugose; seed broadly obovoid, 3 mm. long, pale-brown.
Type locality: Kanab, Utah.
Distribution: In dry soil, southeastern Utah to Chihuahua, western Texas, and Kansas.

Allionia glabra (S. Wats.) Kuntze, Rev. Gen. 533. 189L
Oxybaphus glaber S. Wats. Am. Nat. 7: 301. 1873.
Oxybaphus glaber recedens Weatherby, Proc. Am. Acad. 45: 425. 1910.
Allionia glabra recedens Standley, Contr. U. S. Nat. Herb. 13: 406. 1911.
Stems few or solitary, erect, 81 5 dm . high, usually simple up to the inflorescence or with a few sterile branches below, stout, glaucous or glaucescent, glabrous; leaves distant, or crowded below, sessile, the blades linear, 5-12 cm. long, 2-7 mm. wide, long-attenuate to the base, gradually narrowed to the obtuse or acute apex, entire, thick and succulent, glaucous beneath, glabrous; inflorescence a loose terminal panicle 1-4 dm. long, much branched, the branches very slender, opposite, glabrous or sparsely short-pilose with viscid hairs; involucres slenderpedunculate, at anthesis about 3.5 mm. long, in age 12-15 mm. broad, viscid-pilose or glabrous and ciliate, shallowly lobed, the lobes ovate-orbicular, rounded at the apex; flowers usually solitary, sometimes 2, in the involucre, mostly cleistogamous, the perianth about 7 mm. long, white or pale-pink, glabrous; stamens 5, short-exserted ; anthocarp obovoid, about 5 mm. long, olivaceous, glabrous, the angles acute, narrow, smooth, the sides obtusely short-tuberculate or rugose; seed broadly obovoid, 3 mm. long, pale-brown.
TypB locality: Kanab, Utah.
Distribution: In dry soil, southeastern Utah to Chihuahua, western Texas, and Kansas,

Wedeliella glabra (Choisy) Cockerell, Torreya 9: 167. 1909
Allionia incarnata glabra Choisy, in DC. Prodr. 13 2 : 435. 1849. Wedelia glabra Standley, Contr. U. S. Nat. Herb. 12: 332. 1909.
Annual; stems 2-8 dm. long, slender, often tinged with red, puberulent, or villous above, very slightly or not at all viscid, often glabrate below; leaves of a pair unequal, the smaller about half the size of the larger, the petioles 3-18 mm. long, the blades ovate-oval, oval, or oblong, rarely ovate-deltoid, 1-4 cm. long, 0.6-2.2 cm. wide, subcordate to broadly cuneate at the base and usually unequal, broadly rounded or obtuse at the apex, often crispate and sinuate, yellowishgreen above, glaucous beneath, puberulent or glandular-puberulent when young but soon glabrate, the veins coarse and very prominent beneath; involucres numerous, 5-7 mm. long, on slender peduncles 3.5 cm. long or shorter, the lobes rounded-obovate, apiculate, puberulent and usually shortvillous, finely reticulateveined ; perianth 7-8 mm. long, white or pink, shortvillous outside; fruit pale-brown or olive, 3.5 mm. long, 3-costate on the inner surface, coarsely and shallowly rugose, the margins incurved or spreading, each with 5-8 long slender teeth, the outer surface bearing 2 rows of long-stipitate glands; seed narrowly obovate, 2 mm. long, pale-brown.
Type locality: Near the City of Mexico, Mexico.
Distribution: In dry sandy soil, Arizona to western Texas, Durango, Zacatecas, and Oaxaca; probably also in southeastern Utah and southwestern Colorado.
14, NYCTAGINIA Choisy, in DC. Prodr. 13 2 : 429. 1849.
Perennial herbs with tuberous roots, much branched, viscid-pubescent. Leaves opposite, petiolate, the blades broad, entire or sinuate. Flowers perfect, in long-pedunculate, axillary and terminal, many-flowered heads, each head surrounded by an involucre of numerous narrow unequal bracts; perianth deep-red, funnelform, the tube slender, elongate, constricted above the ovary, abruptly expanded into <* 5-lobed induplicate-plicate limb (or the limb rarely, perhaps abnormally,. 6-lobed), the lobes entire or emarginate. Stamens 5-8; filaments capillary, unequal, dilated and connate at the base, adnate to the perianthtube ; anthers didymous, exserted. Ovary oblong; style filiform, exserted; stigma capitate, papillose. Anthocarp coriaceous, turbinate, constricted above the base, umbonate at the apex, finely costate. Seed with a membranaceous testa adherent to the pericarp; embryo uncinate, the broad cotyledons enclosing the copious farinaceous endosperm; radicle elongate, descending.
Type species, Nyctaginia capitata Choisy.