loganiacejE. (logania family.) 391 



Ordkr 78. LiOGANIACE.lE. (Logania Family.) 



Herbs, shrubs, or trees, loilh opposite and entire leaves, and stipules or a 

 stipular membrane or line between them, and with regular 4 - b-merous 4-5- 

 androus perfect flowers, the ocunj free from the calyx : a connecting group 

 between Gentianaceai, Apocynaccoe, Scrophulariaccae (from all wliich they 

 are known by their stipules) and Rubiaceaj, from which they differ in their 

 free ovary : our representatives of the family are all most related to the 

 RubiaceoB, to which, indeed, they have been apjjcnded. 



* Woorly twiners ; leaves evergreen. 



1. Gelseniiuin. Corolla large, the 5 lobes imbricated in the bud. Style slender : stigmas 4. 



« * Herbs. 



2. Pol ypremuiM. Corolla 4-Iobed, not longer than the calyx, imbricated in the bud. 



3. Spigelia, Corolla 6-lobed, valvate in the bud. Style single, jointed in the middle. 



4. Mitreola. Corolla 5-lobed, valvate in the bud. Styles 2, short, converging, united at the 



summit, and with a common stigma. 



1. GELSEMIUM, Juss. Yellow (False) Jessamine. 



Calyx .5-partcd. Corolla opcn-funnel-form, 5-lobed ; the lobes imbricated in 

 the bud. Stamens 5, with oblong sagittate anthers. Style long and slender. 

 Stigmas 2, each 2-partcd ; the divisions linear. Pod elliptical, flattened con- 

 trary to the narrow partition, 2-celIed, septicidally 2-valved. Seeds many or 

 several, winged. Embryo straight in fleshy albumen ; the ovate flat cotyledons 

 much shorter than the slender radicle. — Smooth and twining shrubby plants 

 with opposite and entire ovate or lanceolate leaves, minute stipules, and showy 

 yellow (lowers, of two sorts as to relative length of stamens and style. ( (Jelse- 

 iidiin, the Italian name of the Jessamine.) 



1. G. semp6rvirens, Ait. (Yellow Jessamine of the South.) Stem 

 climbing high; leaves sbort-petioled, shining, nearly persistent; flowers in 

 short axillary clusters ; pedicels scaly-bracted ; flowers very fragrant (the bright 

 yellow corolla I'-l^' long); pod flat, pointed. —Low grounds, Eastern Vir- 

 ginia and southward. JMarcli, April. 



2. POLYPREMUM, L. PoLYruEMUM. 



Calyx 4-pnrtcd ; the divisions awl-shajied from a brond scariotis-marginrd 

 Lase. Corolla not longer than the caly.x, almost wheel-shaped, bearded in tbc 

 throat; the 4 lobes imbricated in the bud. Stamens 4, very short: anthers 

 globular. Style 1, very short: stigma ovoid, entire. Pod ovoid, a little flat- 

 tened, notched at the apex, 2-cellcd, loculicidally 2-valved, many-seeded. — A 

 smooth, ditnisc, much-branchcil, small annual, with narrowly linear or awl- 

 sliapcd leaves, connected at their b:isc across the stem hy a slight stipular line; 

 tlic small flowers solitary and sessile ia the forks and at the ends of tlic 

 branches; corolla inconspicuous, white. (Name altered from TroXv-pfjivos, 

 mnni/slemmrd ) 



1. P. pi'OC1J.rabenS, L. — Dry fields, mostly in sandy soil, Maryland and 

 southward; also ad ventive at Philadelphia. June- Oct. 



