200 LOGANIACE.E. (LOGANIA FAMILY.) 



21. OLDENLANDIA, PLUM. 



Flowers tetramerous, not dimorphous. Calyx 4-lobed. Corolla rotate, 4- 

 lobed, longer than the 4 incurved stamens ; anthers ovoid. Capsules included, 

 many-seeded. Albumen fleshy. Small marsh herbs, with opposite leaves, 

 4 - 5-parted stipules, and axillary single or clustered minute flowers. 



1. O. Boscii, Chapm. Stems 4-angled, smooth, diffuse ; leaves linear ; 

 flowers single, or 2-3 together ; corolla white or purplish ; capsule ovoid. 

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

 10' loug. 



2. O. glomerata, Michx. Stems terete, smooth or pubescent, branching ; 

 leaves oblong or oval, short-petioled ; clusters dense, many-flowered; corolla 

 greenish white. Wet places, Florida to North Carolina, and westward. 

 July. Stems 3'- 15' high. Earlier flowers mostly single. 



22. PENTODOW, Ilochst. 



Flowers peutamerous. Calyx turbiuate, 5-toothed. Corolla funnel-shaped, 

 5-lolied, longer than the calyx teeth. Stamens short. Capsule included, 

 many -seeded. Albumen fleshy. Tender prostrate glabrous annuals. 



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

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

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

 12' long. Leaves 1' long. 



ORDER 72. LOGANTACEJE. (LOGAXIA FAMILY.) 



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

 regular flowers, and the calyx free from the ovary, which mainly 

 distinguishes the order from Rubiacese. 



Synopsis. 



* Herbs. 



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



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



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



* * Evergreen woody vines. 



4. GELSEMITJM. Corolla campanulate. Seed winged. 



1. SPIGELIA, L. PINKROOT. 



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

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

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

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

 dally. Herbs. Leaves opposite. Flowers in one-sided terminal spikes, 

 rarely solitary. 



1. S. loganioides, A. DO. Stem simple, ascending, simewlint I- 

 angled, the upper part and joints slightly puberulent ; leaves ovate or o.io- 





