PHANEROGAMS— PROFESSOR BAYLEY BALFOUR. 195 



but at the same time its calyx and the style are quite different from those of 

 other species in the Seddera section of the genus, or indeed, in the whole genus. 

 With Cressa its flowers have some resemblance, but the solitary bilobate style 

 is diagnostic. By certain of its technical characters, especially of the style, it 

 might fall into Ipomcea — but the habit is against such an identification. 



All that I can say for its position here is, that it is the most natural one I 

 can find for the plant, which may be considered as one of those forms which 

 break down the somewhat artificial distinctions upon which several of the genera 

 *n this order are, for convenience, based. 



6. DICHONDRA. 



Dichondra, Forst. Char. Gen. 39, t. 20 ; Benth. et Hook. Gen. PI. ii. 879. 



A genus of some five species of creeping herbs, spread through the warmer 

 parts of the globe. 



D. repens, Forst. Char. Gen. 39, t. 20 ; Choisy in DC. Prod. ix. 451 ; 

 Lamk. Illustr. ii. 328, t. 183. 



Socotra. Not uncommon. B.C.S. n. 612. Schweinf. n. 613. 



Distrib. Tropics and sub-tropics of both hemispheres. 



Extending northwards to China in the old world, and though found at the 

 Cape, in the Mascarene and Canary Islands, is not reported from tropical Africa, 

 nor is it found in India. 



7. CRESSA. 



Cressa, Linn. Gen. n. 313 ; Benth. et Hook. Gen. PI. ii. 881. 



Includes a single species which occurs in sandy shore districts of all warmer 

 regions of the globe. 



C. cretica, Linn. Sp. 325 ; Choisy in DC. Prod. iv. 440 ; Ach. Rich. Tent. 

 Flor. Abyss, ii. 75; Boiss. Flor. Orient, iv. 114; Clarke in Hook. Flor. Brit. 

 Ind. iv. 225; Sibth. Flor. Grsec. t. 256 ; Lamk. Illustr. ii. 328, t, 183. 



Socotra. On the sandy plains. Common. B.C.S. n. 539. 

 Distrib. Of the genus. 



8. CUSCUTA. 

 Cuscuta, Linn. Gen. n. 170 ; Benth. et Hook. Gen. PI. ii. 881. 



A considerable genus of warm and temperate regions of the whole globe. 

 Both Socotran species are widely dispersed old world forms. 



1. C. planiflora, Tenore Syll. 128, and Flor. Neap. t. 220, f. 3; Engelm. 

 Cusc. in Trans. Acad. Sc. St, Louis i. (1859), 464 ; Boiss. Flor. Orient, iv. 116 

 Clarke in Hook. Flor. Brit. Inch iv. 227. 



