344 ASCLEPIADACEAE. 



mm. broad, its lobes ovate, acuminate; crown-lobes 1.5-2 mm. long, retuse; 

 anther-wings 1 mm. long; follicles 4.5-7 cm. long, slender, about 5 mm. thick. 



Borders of salinas and salt marshes, Frozen Cay, Andres, New Providence, 

 Eleuthera, Cat Island, Watling's, Long Island, Fortune Island. Mariguana, Green 

 Cay and Inagua : — North Carolina to Florida and Texas ; Cuba. Marsh Metastelma. 



5. PHILIBERTELLA Vail, Bull. Torr. Club 24: 305. 1897. 



Twining vines, with opposite leaves and cymose axillary flowers, their 

 buds 5-angled. Calyx small, 5-parted. Corolla subrotate or widely campanu- 

 late, 5-lobed. Corona double, the exterior one annular, adnate to the base of 

 the corolla, the interior one of 5 scales. Stamens borne on the base of the 

 corolla, the filaments united into a short tube, the anthers with a terminal 

 inflexed membrane. Pollinia solitary in each cell, oblong, waxy. Follicles 

 elongated, smooth. [Commemorates J. C. Philibert.] About 30 species of 

 tropical and subtropical America. Type species: PhiliberteUa clausa (Jacq.) 

 Vail. 



1. PhiliberteUa clausa (Jacq.) Vail, Bull. Torr. Club 24: 306. 1897. 



Asclepias clausa Jacq. Enum. 17. 1760. 



Sarcosiemma Brownei Meyer; Spreng. Syst. 1: 854. 1825. 



PMlibertia clausa Schum. in Engl. & Prantl, Nat. Pflanzf. 4-: 229. 1895. 



A somewhat fleshy, herbaceous vine often 3 m. long or longer. Leaves ob- 

 long to oblong-lanceolate or ovate-oblong, short-petioled, 3-8 cm. long, glabrous, 

 acute or acuminate at the apex, rounded or subcordate at the base; peduncles 

 glabrous, longer than the leaves ; umbels several-flowered ; pedicels slender, 

 puberulent, 7-12 mm. long; calyx puberulent, 4 mm. long, its lobes oblong- 

 lanceolate; corolla white, 10-12 mm. broad, its lobes oblong or ovate; follicles 

 glabrous, 5-8 cm. long. 



Wet places. Great Bahama and New Providence : — Florida ; Cuba ; Hispaniola ; 

 Jamaica ; Grenada. Milk Vine. 



Marsdenia forihunda (Brongn.) Schltr. (Stepha^iotis fforihnnda Brongn.) re- 

 corded by Dolley as cultivated In gardens is not l^nown to us as having become spon- 

 taneous at any place in the islands. 



Fruiting specimens of an undetermined asclepiadaceous vine, with lanceolate 

 leaves and a fusiform follicle, were collected by Small & Carter, in pine-lands near 

 Lisbon Creek, Mangrove Cay, Andros, perhaps a species of AstepJianus. 



Order 4. POLEMONIALES. 



Mostly herbs; rarely shrubs or trees. Corolla almost ahvays gamo- 

 petalous, regular or irregular. Stamens adnate to the corolla-tube usually 

 to the middle or beyond, as many as the corolla-lobes, or fewer and alter- 

 nate with them. Ovary 1, superior, compound (in Boraginaceae and 

 Lamiaceae deeply 4-lobed around the style). 



a. Corolla regular. 



1. Ovary not 4-lobed, the carpels not separating as distinct nutlets at maturity. 



Ovary 2-celled, rarely 8-4-celled. 



Leaves and flowers mostly large ; plants not parasitic. 



Ovary 2-4-celled. Fam. 1. Convolvulaceae. 



Ovary 2-divided. Fam. 2. Dichondraceae. 



Leaves none ; flowers very small ; slender para- 

 sitic vines. Fam. 3. Ci'SCUTACeae. 

 Ovary 1-celled ; style 1, 2-lobed, or 2-parted. Fam. 4. Hydrophyllaceae. 



2. Ovary deeply 4-lobed around the style, or not lobed ; 



carpels mostly separating as distinct nutlets. 

 Ovary not lobed ; styles terminal. Fam. 5. Ehretiaceae. 



Style arising from between the ovary-lobes. Fam. 6. Boraginaceae. 



