200 LO(iAMA< i:.K. (lOGAMA lA.MlLV.) 



21. OLDENLANDIA, I'j-i m. 



Flowers tetramcmus, iml (liiiiinjilitius. TjiIn x 4-lolied. Corolla rotate, 4- 

 lobc'd, litiigur than the 4 imurved staiin-us ; aiitliurs ovoid. Capsuk-.s iiieliuled, 

 niaiiv-soedud. Allniiiieii He.sliy. — Small luarsli lierl).s, with ojiposiie leaves, 

 4 - S-parteil stijiiiles, and axillary siiigio or dustereil iiiimitu tlowers. 



1. O. Boscii, t'hapiu. Stems 4-aiiglt'd, smoolii, diffuse ; leaves linear; 

 flowers single, or 2-3 together ; eomlhi white or jjurjdisli ; eapsule ovdid. — 

 River banks, Florida to South Carolina, and westward. July. — Stems 6'- 

 10' h.ng. 



2. O. glomerata, Miihx. Stems terete, smooth or jiul)esccnt, branching ; 

 leaves oblong or oval, short-petioled ; elusters dense, mauy-liowered; corolla 

 greenish white. — NVet places, Florida to Korth Carolina, and westward. 

 Ja'y. — Stems 3'- 15' high. Karlier Howers mostly single. 



22. PENTODON, Ilochst. 



Flowers peutamerous. Calyx turl)inate, 5-tootlied. Corolla funnel-shaped, 

 5-lobed, longer than the calyx teeth. Stamens short. Cajisule included, 

 many-seeded. Albumen fleshy. — Tender jjrostrate glabrous aunmils. 



1. P. Halei, Cray. Stems weak, diffuse, forking; leaves oval-oblong, 

 acute at each end, somewhat fleshy ; flowers solitary, or in short 3 - .5-flowered 

 cymes, white. — Banks of rivers, Florida, and westward. July. — Stem 6'- 

 12' long. Leaves 1' long. 



Order 72. LOGANTACE^. (Logania Family.) 



Herbs, shnibs, or trees, with opposite entire stipulate leaves, 

 regular flowers, and tlie calyx free IVoin the ovary, which mainly 

 distinguishes the order from liubiacese. 



Synopsis. 



* Herbs. 



1. SPIGELIA. Corolla tubular. Style single, iointed. 



2. MITREOLA. Corolla .sliort, .5-lobed. Styles 2, united above. 



3. POLTPREMUM. Corolla short, 4-lobed. Style single. 



* * Evergreen woody vines. 



4. GELSEMIUM. Corolla campanulate. Seed winged. 



1. SPIGELIA, L. PixKRooT. 



Calyx 5-parted, the lobes linear-subulate, persistent. Corolla tubular-fun- 

 nel-sliaped, 5-lobed, valvate in. the bud Stamens 5, anthers linear. Style 

 slender, jointed, hairy above. Stigma cajjitate. Capsule composed of two 

 few-seeded carpels, which at length separate at the base and open locnlici- 

 dally. — Herbs. Leaves opposite. Flowers in one-sided terminal s])ikes, 

 rarely solitary. 



1. S. loganioides, A. PC. Stem simple, ascending, somewhat 4- 

 angled, the upjier part and joints slightly puberulent ; leaves ovate or obo- 



