2 1 8 DIMORPHANTHERA 



Dimorphanthera F. Muell. (Agapetes p.p.)- Eric. (in. 2). 4 Malaya, 

 Australia. 



Dimorpliantlies Cass. =Conyza L. (Comp. ). 



Dimorphanthus Miq. = Aralia Tourn. 



Dimorphism, appearing in two forms, e.g. flower, Asperula, Cassia, 

 Exacum, Saintpaulia, and cf. Dioecism, Hfterostylism; fruit, Car- 

 damine, Chenopodium, Dimorphotheca ; inflorescence, Trifolium ; 

 leaf, Anisophyllea, Bidens, Dischidia, Ficus, Hedera, Heteranthera, 

 Platyceriuin, Polygonum, Polypodium, Ranunculus, Sagittaria, 

 Salvinia, Trapa, and cf. Water-plants; plant, Littorella ; polltn, 

 Faramea; root, Araceae, Ficus, Jussieua, Orchidaceae; shoot, Marc- 

 gravia, Salacia; stamens, Heeria, Monochaetum. 



Dimorphocalyx Thw. Euphorbiaceae (A. n. 5). 6 Indomal. 



Dimorphochlamys Hook. f. Cucurbitaceae (3). 3 trop. W. Afr. 



Dimorphocoma F. Muell. et Tate. Compositae (7). i C. Austr. 



Dimorphotheca Vaill ex L. Compositae (10). 20 S. and trop. Afr. 

 There are two kinds of fr. on the head (cf. Calendula). 



Dinacria Haw. (Crassula p.p. EP.). Crassulaceae. 2 S. Afr. 



Dinebra Jacq. Gramineae (n). i trop. Afr., As. 



Dinemagonum A. Juss. Malpighiaceae (i). 4 N. Chili. 



Dinemandra A. Juss. ex Encll. Malpighiaceae (i). 6 Peru, Chili. 



Dinklagea Gilg. Connaraceae. i Liberia. 



Dinochloa Buese. Gramineae (13). 6 Malay Archip. 



Dinophora Benth. Melastomaceae (i). 2 trop. W. Afr. 



Dinoseris Griseb. Compositae (i 2). i Argentina. 



Dintera Stapf. Scrophulariaceae (n. 6). i trop. Afr. 



Dinteracanthus C. B. Clarke ex Schinz. Acanth. (iv. A). 3 S. Afr. 



Dioclea H. B. et K. Leguminosae (in. 10). 20 trop. 



Diodia Gronov. Rubiaceae (11. 10). 35 trop. and subtrop. D. niari- 

 t/i/ia Schum. et Thonn. is common to Afr. and Am. 



Dioecism (-ious), <? fl. on one pi., ? on another; Antcnnaria, Arisaema, 

 Ancuba, Cannabis, Mercurialis, Myrica, Rhamnus, Rhus, Salix, 

 Taxus. 



Diolena Naud. Melastomaceae (i). 6 trop. S. Am. 



Diomedia Cass. = Borrichia Adans. (Comp.). 



Dionaea Fllis. Droseraceae. i Carolina, D. muscipula Ellis (Venus' 

 fly-trap), in damp mossy places on the 'pine-barrens.' Short rhiz. 

 bearing a rosette of 1., which lie close to the soil. Each has a lower 

 and an upper blade; the former may be regarded as a winged petiole, 

 the latter has a quadrangular shape and the margins project as long 

 teeth close together. The two halves of this part of the 1. are bent 

 upwards so as to present a flat V-form in section. The edge of each 

 half is green, the inner part of the surface is covered with reddish 

 dots, which under the microscope are seen to be digestive glands; 

 unless stimulated, no secretion is carried on. On each half of the 1. 

 are three long hairs the trigger-hairsjointed at the base so that 

 they fold downwards when the 1. closes. The slightest touch to one 

 of these, or a more vigorous stimulus to the surface of the 1., causes 

 an immediate closing. The teeth cross one another, and i 1 an insect 

 cause the movement, it is thus captured. The closing of the 1. still 

 continues till the two halves are tightly squeezed together. Then 



