118 ASCLEPIADACEAE. 



5. LYONIA Ell. Slender vines with narrow leaf-blades. Calyx-lobes 

 longer than the corolla-tube. Corolla rotate-campanulate : lobes spreading at the 

 tip, glabrous within. Crown adnate to the short column: lobes naked at the 

 apex, longer than the gynostegium. Stigma conic. 



1. L. palustris (Pursh) Small. Leaf -blades linear, 2-7 em. long, acute, pendant : 

 calyx-lobes lanceolate, about 2.5 mm. long: corolla-lobes purplish or greenish- 

 white, 3-4 mm. long: crown-lobes 1.5-2 mm. long, retuse or emarginate at the 

 apex: anther-wings about 1 mm. long: follicles 4.5-5.5 cm. long. Hammocks. 

 U. S. keys, U. keys, L. keys. [E. K.] (Bah., Cuba.) 



6. METASTELMA K. Br. Slender vines with narrow leaf -blades. Calyx- 

 lobes longer than the corolla-tube. Corolla rotate-campanulate: lobes pubes- 

 cent within. Crown adnate to the very short column: lobes slender, curved 

 over the anthers. Stigma flat. 



1. M. Blodgettii A. Gray. Leaf-blades linear or linear-lanceolate, 8-27 mm. 

 long: corolla whitish; lobes penicillate-bearded near the apex within: crown 

 adnate to the base of the column: follicles 4-5 cm. long. Hammocks, U. keys, 

 L. keys. [E. K.] 



7. EPICION Small. Slender vines with relatively broad leaf-blades. 

 Calyx-lobes shorter than the corolla- tube. Corolla campanulate: lobes pubes- 

 cent within. Crown adnate to the elongate column: lobes narrow, not longer 

 than the anthers. Stigma flat or depressed. 



1. E. bahamense (Griseb.) Small. Leaf-blades oblong to oval, 1.5-2.5 cm. 

 long, slender-petioled: calyx-lobes 1-1.5 mm. long: corolla white, 4-4.5 mm. 

 long; lobes obtuse: crown-lobes 1-5 mm. long: follicles 5-6.5 cm. long. 

 [M. bahamense Griseb.] Hammocks and pinelands, U. S. keys, U. keys, L. keys, 

 L. S. keys. [E. K.] (Bah., Cuba.*) 



Order POLEMONIALES. 



Herbs, or sometimes shrubs or trees, the plants of some groups para- 

 sitic. Leaves with dilated blades or scale-like. Flowers mainly perfect. 

 Calyx of partly united sepals. Corolla of partly united petals, regular or 

 irregular. Androecium of as many stamens as there are corolla-lobes, or 

 fewer, sometimes partially represented by staminodia, or partially obso- 

 lete. Gynoecium of 2 distinct or several united carpels. Ovary superior. 

 Fruit a capsule, a berry, or a dupe, or a group of nutlets or utricle-like. 



Stamens 5. 



Gynoecium of 2 distinct carpels. Fam. 1. DICHONDEACEAE. 



Gynoecium of 2 or more partially or wholly united 



carpels. 



Fruit capsular or baccate : ovary not 4-lobed. 

 Styles or stigmas distinct. 



Ovary 1-2-celled, or rarely 4-or 5-celled : 



stigmas 2. 



Ovary 3-celled : stigmas 3. Fam. 2. CONVOLVULACEAE. 



Ovules, and seeds, few. Fam. 2. CONVOLVULACEAE. 



Ovules, and seeds, numerous. Fam. 3. HYDBOLEACEAE. 



Styles or stigmas wholly united. 



Median axis of the gynoecium in the same 



axis as the stem : seeds mostly pitted. Fam. 4. SOLAXACEAE. 

 Median axis of the gynoecium not In 

 the axis of the stem : seeds mostly 



tuberculate. Fam. 10. RHINAXTHACEAE. 



Fruit drupaceous, or of 2 or 4 nutlets. 



