LOGANIACE^E. (LOGANIA FAMILY.) 391 



ORDER 78. L.OGANIACEJE. (LOGANIA FAMILY.) 



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

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

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

 between Gentianaceae, Apocynaceae, Scrophulariaceae (from all which they 

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

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

 Rubiaceae, to which, indeed, they have been appended. 



* Woody twiners : leaves evergreen. 



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



* * Herbs. 



2. Polypremum. Corolla 4-lobed, not longer than the calyx, imbricated in the bud. 



3. Splgelia. Corolla 5-lobed, valvate in the bud. Style single, jointed in the middle. 



4. Mitreola. Corolla 5-ldbed, 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-parted. Corolla open-funnel-form, 5-lobed ; the lobes imbricated in 

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

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

 trary to the narrow partition, 2-celled, 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 flowers, of two sorts as 10 relative length of stamens and style. ( Gdse- 

 mino, the Italian name of the Jessamine. ) 



1. G. semp6rvirens, Ait. (YELLOW JESSAMINE of the South.) Stem 

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

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

 yellow corolla !'-!' long); pod flat, pointed. Low grounds, Eastern Vir- 

 ginia and southward. March, April. 



2. POLYPREMUM, L. POLYPREMUM. 



Calyx 4-parted ; the divisions awl-shaped from a broad scarious-margined 

 base. Corolla not longer than the calyx, almost wheel-shaped, bearded in the 

 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-celled, loculicidally 2-valved, many-seeded. A 

 smooth, diffuse, much-branched, small annual, with narrowly linear or awl- 

 shaped leaves, connected at their base across the stem by a slight stipular line ; 

 the small flowers solitary and sessile in the forks and at the ends of the 

 branches ; corolla inconspicuous, white. (Name altered from iro\v7rpffj.vos, 

 many-stemmed. ) 



1. P. proctimbens, L. Dry fields, mostly in sandy soil, Maryland and 

 southward; also adventivc at Philadelphia. June -Oct. 



