SPIGELIACEAE 921 



polygamous or dioecious : calyx glabrous ; lobes triangular or ovate-triangular : corolla 

 3-4 mm. long ; lobes spreading, ovate to suborbicular : drupes oval-ovoid or oval-obovoid, 

 10-14 mm. long, deep purple. 



In sandy soil, North Carolina to Florida and Mississippi. Spring. 



2. Osmanthus Floridana Chapm. An evergreen shrub or tree similar to the pre- 

 ceding in habit. Leaves sometimes larger and with thicker blades : inflorescence finely 

 pubescent : calyx pubescent ; lobes acute : corolla 4-5 mm. long ; lobes recurved : drupes 

 jelloAvish green, 16-20 mm. long. 



In hammocks, peninsular Florida. Spring. 



Order 5. GENTIANALES. 



Herbs, shrubs or trees, sometimes aquatic plants, sometimes vines, rarely sap- 

 rophytes. Leaves mainly opposite : blades simj)le, typically entire. Flowers 

 mostly perfect, in variously modified cymes, or solitary. Calyx of 5 partially 

 united sepals or fewer. Corolla of 5 partially united petals, or fewer. Androe- 

 cium of as many stamens as there are corolla-lobes. Filaments free or partially 

 adnate to the corolla-tube. Anthers erect or versatile. Gynoecium of 2 more or 

 less united carpels, or rarely of more. Styles distinct or united. Ovules numer- 

 ous. Fruit capsular, baccate or drupaceous. 



Ovary 2-celled : leaves stipulate or the bases connected by stipular lines. Fam. 1. Spigeliaceae. 

 Ovary 1-celIed : leaves not stipulate. 



Corolla-lobes convolute or imbricated in the bud. • Fam. 2. Gentianaceae. 



Corolla-lobes induplicate-valvate in the bud. Fam. 3. Menyanthaceae. 



Family 1. SPIGELIACEAE Mart. Logania Family. 



Herbs, shrubs or vines, or sometimes trees in the tropics. Leaves opposite 

 or whorled, with stipules : blades simple. Flowers perfect, or rarely somewhat 

 dioecious, regular, in cymes or panicles, or somewhat capitate, of various colors. 

 Calyx inferior : limb 4-5-lobed, the lobes imbricated or valvate. Corolla gamo- 

 petalous, 4-5-lobed : lobes valvate, imbricated or convolute. Androecium of 4-5 

 stamens alternate with the corolla-lobes. Filaments filiform or subulate. Anthers 

 2-celled, opening lengthwise. Pollen granular. Ovary superior, 2-celled or 

 rarely 3-5-celled. Styles united, sometimes only partially so. Stigmas distinct 

 or united. Ovules solitary or 2, or sometimes numerous in each cavity of the 

 ovary, amphitropous or anatropous. Fruit sometimes capsular, dehiscent by 2 

 valves, or baccate or drupacous and indehiscent. Seeds winged, or wingless, 

 with a smooth rugose or tuberculate testa. Endosperm copious. Embryo 

 straight or curved in the endosperm. \_Loganiaceae Dumort.] 



Shrubby vines : stigmas 4 : corolla yellow. 1. Gelsemium. 



Herbs : stigmas entire or barely 2-lo"bed : corolla not yellow without. 

 Corolla-lobes valvate. 



Corolla funnelform or salverform : styles permanently united. 



Flowers in the forks of leafy branches : style jointed near the middle. 2. Coelostylis. 



Flowersin terminal spikes or spike-like racemes : style jointed near the base. 3. Spigelia. 

 Corolla urn-shaped : styles soon distinct. 4. Cynoctonum. 



Corolla-lobes imbricated. 



Annual herb: sepals nearly distinct : capsule loculicidal. 5. Polypremum. 



Shrubs, trees or shrubby herbs : sepals chiefly united : capsule septicidal. 6. Buddleia. 



1. GELSEMIUM Juss. 



Shrubby vines. Leaves opposite : stipules minute, caducous, leaving only an incon- 

 spicuous scar. Inflorescence cymose. Flowers solitary or sometimes four together. Calyx- 

 lobes 5 : membranous. Corolla funnelform, dilated, 5-lobed, the lobes imbricated. Sta- 

 mens 5, adnate to the base of the corolla-tube. Ovary 2-celled : style filiform : stigma 4 

 flat. Ovules numerous in each cavity of the ovary, borne in several rows on narrow 

 placentae. Capsule compressed contrary to the narrow septum, septicidal : valves 2, at 

 length two-cleft at the apex. Seeds usually numerous, compressed, winged. Endosperm 

 fleshy. Yellow Jessamine. Evening Tbumpet-flower. 



1. Gelsemium semp^rvlrens (L. ) Ait. f. An evergreen high-twining vine. Stems 

 often tangled and matted : leaf-blades thickish, lanceolate, oblong-lanceolate or sometimes 



