666 PATAGONIAN EXPEDITIONS I BOTANY. 



b2. Style 2-branched, with filiform stigmas. Ovary i-2-celled, cells i -seeded. 



3. Evolvulus, p. 666. 



3. Style undivided to the stigma. Fruit capsular, dehiscent, with thin or hard pericarp. 

 Calyx-leaves separate, often unequal. Flowers large. Bracts small, not close to the 

 calyx. 4. Convolvtilus, p. 667. 



64. As Convolvulus, but stigma 2-lobed ; ovary I -celled, with 4 seeds. Calyx enclosed by 2 

 large bracts. Calystegia, subgenus of Convolvulus, p. 667. 



i. DICHONDRA Forst. 



Slender, prostrate, with reniform, petioled, often small leaves, and small 

 flowers, solitary on the pedicels. Sepals spatulate. Corolla campanulate, 

 5-cleft. Ovary with 2 distinct lobes, each 2-celled, usually villous. Styles 

 2, between the lobes, stigmas capitate. 



Species 5, in warm climates. (Fig. in Eng. & Prantl, iv, 30, p. 13.) 



D. SERICEA Sw. 



Leaves silky underneath. Stem rooting at the nodes. 

 N. Patagon., near Rio Negro. 



2. WILSONIA R. Br. 



Small, prostrate, much branching, smooth or silky ; leaves small, crowded, 

 sessile, rather fleshy. Flowers small, sessile, solitary. Calyx tubular- 

 campanulate, with short lobes. Corolla somewhat salver-shaped. Sta- 

 mens usually exserted. Capsule i -2-celled, i-2-seeded. Style filiform, 

 2-branched ; stigmas capitate. 



(Figs. A-C, in Eng. & Prantl, iv, 30, p. 15.) 



Species 4, Australia, with the following: 



W. HUMILIS R. Br. 



Leaves very closely imbricating, distichous, ovate, silky. Corolla-ttibe 

 scarcely exceeding the calyx. 



(Austral.); S. Patagon., Puerto Madryn. (Dusen.) 



(Frankenia cymbifolia of Hooker, "errore," Benth. & Hook, ii, 881.) 



3. EVOLVULUS Linn. 



Erect or prostrate, not twining, often silky or hairy, with small or nar- 

 row leaves and rather small flowers. Ovary 2-1 -celled, 4-seeded. Styles 

 2, distinct, each 2-cleft. 



Species 80, in warm parts of both worlds. 



