222 



DIPTERA CANTHUS 



Dipteracanthus Nees = Ruellia L. p.p. (Acanth.). 

 Dipteranthemum F. Muell. Amarantaceae (2). i Austr. 

 Dipteranthus Barb. Rodr. (Zygostates EP.). Orchid, (n. 19). 2 Brazil. 



Dipteris Keinvv. Polypodiaceae. 5 As., Polynesia. 

 Dipterocarpaceae ( EP., BH. incl. Ancistrocladaceae]. Dicols. (Archichl. 

 Parietales; Gutliferales BH.}. 16 gen., 320 sp., trop. Afr. and As., 

 chiefly in India, mostly tall, little branched trees with entire leathery 

 stip. 1., and racemose infls. of 5 , reg., pentamerous fls. Receptacle 

 flat or slightly concave. K 5 ; C * conv. ; A 5, 10, 15 or more; 

 G (3), 3-loc., with 2 ov. in each loc. Fr. usu. a i-seeded nut en- 

 closed in the K, some of whose 1. grow out into wings serving as an 

 aid in wind-carriage of the seeds. No endosp. All contain resin- 

 passages. Some gregarious in growth. Many are very valuable as 

 timber trees, and in other ways. Chief genera: Dipterocarpus, 

 Dryobalanops, Shorea, Vatica, Valeria. (BH. cbars. incl. those of 

 Ancistrocladaceae.) 



Dipterocarpus Gaertn. Dipterocarpaceae. 65 India, Ceylon to Phil. 

 Is. The large amplexicaul stipules protect the young bud (cf. 

 Magnolia, &c.). Several yield wood-oil or Gurjun balsam, a resin 

 obtained by tapping, used as a varnish. Many yield useful timber. 



Dipterocome Fisch. et Mey. Compositae (9). i Persia. 



Dipterodendron Radlk. Sapindaceae (i). 2 Costa Rica. 



Dipteronia Oliv. Aceraceae. 2 Centr. China. Mericarp winged all 

 round. 



Dipteropeltis Hallier f. Convolvulaceae (i). i Cameroons. 



Dipterosiphon Huber. Burmanniaceae. i Para. 



Dipterostemon Rydberg (Brodiaea p.p.). Liliaceae (iv). 4 W. N.Am. 



Dipterygium Decne. (Pteroloma Hochst.). Capparidaceae (Cruciferae 

 BH.}. 5 Punjab to 'Nubia. 



Dipteryx S'chreb. (Coumaroiina Aubl.). Leguminosae (ill. 8). 8 trop. 

 Am. Fr. one-seeded indeh. D. odorata Willd. furnishes Tonka 

 or Tonquin beans (the seeds) used in snuff, perfumery, &c. Wood 

 useful. 



Diptychandra Tul. Leguminosae (n. 8). 3 Brazil, Bolivia. 



Diptychocarpus Trautv. Cruciferae (4). i Centr. As. 



Dipyrena Hook. Verbenaceae (i). i temp. S. Am. 



Dirachma Schweinf. Geraniaceae. i Socotra. 



Dirca L. Thymelaeaceae. 2 N. Am. 



Dircaea Decne. =Gesnera Mart. (5//.). = Corytholoma Decne. 



Dirichletia Klotzsch. Rubiaceae (I. 2). 12 trop. Afr., Madag. 



Disa Berg. Orchidaceae (ll.i). looS. and trop. Afr. ; Masc. Cult.orn.fl. 



Disaccanthus Greene (Streptanthus p.p.)- Cruc. (i). 6 W. N.Am. 



Disachaena Zoll. et Mor. Umbelliferae. Nomen. 



Disakisperma Steud. Gramineae (inc. sed.). i Mexico. 



Disanthus Maxim. Hamamelidaceae. i Japan. 



Disarticulate, to separate at a joint. 



Disc, a flattening of the receptacle above the K, Anacardiaceae, Celas- 

 tracc>it\ Rtttaceae; -flower, Compositae; -old, like a disc. 



Discaria Hook. Rhamnaceae. 20 Andes, N.Z. , Austr. 



Dischidia R. Br. (incl. Conchophyllum Blume). Asclepiadaceae (n. 4). 

 70 Indomal., Polynes., Austr. Epiphytes, climbing by adv. r., and 



