18 NORTH AMERICAN FLORA [VOLUME 32 
Ovary 2-celled; style short, the 2 branches linear; ovules numerous, the placentae affixed to the 
septum. Capsule membranaceous, hemispheric-turbinate, subdidymous, 2-celled, truncate 
at the apex, many-seeded, loculicidally dehiscent between the calyx-teeth. Seeds minute, 
angulate, the testa roughened; endosperm fleshy; embryo minute, clavate. 
Type species, Pentodon decumbens Hochst, 
Corolla pilose within; peduncles mostly as long as the leaves, the flowers race- 
mose, the pedicels slender, usually more than twice as long as the capsule. 1. P. pentander. 
Corolla glabrous within; peduncles shorter than the leaves or obsolete, the flowers : 
cymose, the pedicels clavate, usually less than twice as long as the capsule. 2. P. Hale: 
1. Pentodon pentander (Schum. & Thonn.) Vatke, Oesterr. Bot. 
Zeits.-25: 231. U7a: 
Hedyotis pentandra Schum. & Thonn. Beskr. Guin, Pl. 71. 1827. 
Oldenlandia pentandra DC. Prodr. 4: 427. 1830. 
Oldenlandia macrophylla DC. Prodr. 4: 427. 1830. 
Pentodon decumbens Hochst. Flora. 27: 552. 1844. 
Stems stout, 2-10 dm. long, much branched, the internodes longer than the leaves; sti- 
pules 3 mm. long or shorter, often cuspidate; petioles very short, most of the leaves sessile; 
leaf-blades lanceolate, lance-oblong, or narrowly oblong-elliptic, 1.5—6.5 cm. long, 0.4-2 cm. 
wide, rounded or obtuse at the base, usually gradually attenuate to the acuminate apex, some- 
times subobtuse, bright-green above, pale beneath, the costa prominent, the lateral veins 
obsolete; peduncles slender, mostly as long as the leaves, the flowers few, racemose, the pedicels 
slender, 1 cm. long or shorter, refracted after anthesis; hypanthium at anthesis about 1 mm. 
long, the calyx-teeth shorter, triangular, acuminate; corolla about 3 mm. long, pilose within; 
capsules 2.5-3.5 mm. long and broad; seeds minute, brown, scrobiculate. 
TYPE LOCALITY: Guinea. — ; : ; : 
DISTRIBUTION: Adventive in Guadeloupe; native of tropical and subtropical Africa. 
2. Pentodon Halei (T. & G.) A. Gray, Syn. Fl. N.Am.1?: 28. 1884. 
Hedyotis Halei 'T. & G. Fl. N. Am. 2:42. 1841. 
Oldenlandia Halei Chapm. F1. S. U.S. 181. 1860. 
Oldenlandia succulenta C. Wright; Griseb. Cat. Pl. Cub. 285. 1866. 
Stems weak, usually much branched, rarely simple, 1-10 dm. long, the internodes mostly 
longer than the leaves; stipules 2 mm. long or shorter, scarious, often cuspidate and denticulate; 
petioles slender, marginate, 1.5 cm. long or shorter, the uppermost leaves short-petiolate; 
leaf-blades mostly ovate, sometimes broadly ovate, oval, elliptic, or lanceolate, 1-5 cm. long, 
0.4-2.8 cm. wide, rounded to acute at the base and decurrent, acute or obtuse at the apex, 
rarely abruptly acuminate, bright-green above, pale beneath, the costa prominent beneath, the 
lateral veins obsolete; peduncles shorter than the leaves, sometimes obsolete, bearing 2—4 
cymose or umbellate flowers, the pedicels clavate above, 7 mm. long or shorter, ascending or 
spreading in fruit; hypanthium at anthesis 1 mm. long, the calyx-lobes as long or longer, 
triangular-lanceolate, attenuate; corolla 2 mm. long, glabrous within; capsules 3-4 mm. long, 
longer than broad; seeds minute, brown, scrobiculate. 
TyYP& LOCALITY: Red River, near Alexandria, Louisiana. 
DISTRIBUTION: In wet soil, Florida to Texas; Cuba. 
11. OLDENLANDIA L. Sp. Pl. 119. 1753. 
Listeria Neck. Elem. 1: 206. 1790. 
Gerontogea Cham. & Schlecht. Linnaea 4: 154. 1829. 
Edrastima Raf. Ann. Soc. Linn. Bordeaux 6: 269. 1834. 
Stelmoltis Raf. New Fl. 4: 101. 1838. 
Stelmanis Raf. Aut. Bot. 13. 1840. 
Annual or perennial herbs, sometimes suffrutescent, usually dichotomously branched, 
glabrous or pubescent. Leaves opposite, sessile or petiolate, the blades usually small. Sti- 
pules small, acute or acuminate, sometimes setose. Flowers small, in dichotomous axillary 
and terminal panicles or cymes or sometimes solitary; hypanthium turbinate or subglobose; 
calyx 4-parted, the lobes usually erect and remote in fruit, rarely approximate; corolla rotate or 
funnelform, the tube short or elongate, the throat usually glabrous, the limb 4-lobate, the 
