MACLOSKIE I CONVOLVULACE/E. 665 



ASCLEPIAS CAMPESTRIS Dene. 



Roots fibrous ; stem simple or branching, flexuose, bifariously pubescent, 

 compressed. Leaves oval or elliptic-ovate, acute, short-petioled, glabrate. 

 Peduncles extra-axillary, short, with pubescent pedicels in many-flowered 

 umbels. Corolla-segments ovate-acute ; hoods ovate-oblong, with rounded 

 margins and acute, falciform processes. 



(Brazil) ; N. Patagon., by Rio Negro. 



4. MELINIA Dene. 



Twining undershrubs, with opposite, cordate leaves, and small flowers 

 in a few-flowered, peduncled, axillary umbel. Crown-scales short, broad. 

 Stigma long, rostrate. Follicles acuminate from a dilated base. Seeds 

 comose. 



Species 5, in eastern extra-tropical S. Amer. 



M. CANDOLLEANA (Hook. & Arn., sub Brachylepis] DC. 



Twining, pubescent. Leaves cordate, acute, deeply 2-lobed at base, 

 membranaceous. Peduncles longer than leaves, corymbose, few-flowered 

 (4-6). Flowers small, apparently ochroleucous. Lobes of crown without 

 a ligular appendage. 



(Entrerios) ; Patagon., flowering late, in the season (Ap.-May) ; by Rio 

 Sta. Cruz. 



Family 93. CONVOLVULACE.E. Convolvulus Family. 



Usually twining herbs, with alternate, exstipulate leaves, and regular, 

 sympetalous, axillary flowers, mostly showy, with 5 epipetalous stamens, 

 and normally 2-3 celled, superior ovary; cells 2-ovuled. Seeds endo- 

 spermous, with crumpled embryo. 



Species 900, cosmopolitan. 



KEY TO THE GENERA. 



a. Ovary partite, of 2 dry, i -seeded mericarps. Styles 2, basal from the center. Calyx free. 



Small, low or creeping herbs, with broad, petiolate leaves. I. Dichomlra, p. 666. 



(12. Ovary entire. Style i, sometimes 2-parted, or styles 2. 



b. Stigma entire, capitate, or slightly lobed. Corolla salverform. Ovary i-2-celled, 

 2-seeded. Calyx-leaves subequal, connate. Capsule ripening above ground, dehiscent. 

 Upright or low, with fleshy leaves and solitary flowers. 2. Wilsonia, p. 666. 



