326 HEURNIOPSIS 



Heurniopsis N.E. Kr. (Hnerniopsis). Asclep. (n. 3). i S. Afr. 



Hevea Auhl. Euphorbiaceae (A. II. 3). 20 trop. Am. //. brasiliensis 

 Miill.-Arg. is the source of the best caoutchouc (Para rubber), largely 

 exported from Brazil. The tree was introduced into Ceylon and the 

 east in 1876, and in recent years a very large planting industry has 

 grown up in it. Incisions, usu. herring-bone-like, are made in the 

 bark, and the latex flows from them. The wound is renewed at 

 intervals of one or two days by shaving off a thin slice from the 

 lower side, when there is a larger flow of milk than at first. The 

 milk is usu. coagulated with the aid of enough acid to neutralise its 

 alkalinity, and the resulting 'biscuits' or sheets are dried, or made 

 into crepe or other forms. Cf. Willis, Agriculture in the Tropics. 



Hewardia Hook. Liliaceae (inc. sed.). i Tasmania. 



Hewittia Wight et Arn. Convolvulaceae (i). 5 trop. 



Hex- (Gr. preT.), six ; -androus, with 6 sta. , &c. 



Hexadesmia Brongn. Orchid, (n. 6). 5 Brazil to Mexico and W.I. 



Hexaglochin Nieuwland (Triglochin p.p.). Juncag. i U.S. 



Hexaglottis Vent. Iridaceae (n). 3 Cape Colony. 



Hexalectris Rafin. Orchidaceae (n. 7). 2 Mex., S. U.S. 



Hexalobus A. DC. Anonaceae (3). 8 trop. Afr., Madag. 



Hexaptera Hook. Cruciferae (i). 6 temp. S. Am. Fr. winged. 



Hexapterella Urb. Burmanniaceae. i Lower Amazon. 



Hexasepalum Bartl. ex DC. (Diodia p.p. EP.). Rubi. (n. 10). i Mex. 



Hexatheca C. B. Clarke. Gesneriaceae (i). i Borneo. 



Hexisea Lindl. Orchidaceae (n. 6). 5 Brazil to Mex. and W.I. 



Heylandia DC. Leguminosae (in. 3). r S. India, Ceylon. 



Heynea Roxb. (IVdlmra p.p. EP.).' Meliaceae (in). 4 Indomal. 



Heywoodia Sim. Euphorbiaceae (A. I. i). i Cape Col. (Cape ebony). 



Hians (Lat.), gaping. 



Hibbertia Andr. (incl. Candollea Labill. 1806). Dilleniaceae. 100 

 Austr. , New Caled. &c. Mostly ericoid or climbing shrubs. Some 

 have phylloclades. Infl. dich., but often, by reduction, coming to look 

 like a raceme. The sta. &c. vary much in number in different sp. 



Hibernation, remaining ^quiescent during winter ; cf. Bulbs, Corms, 

 Rhizomes, Tubers, Water-plants, Orchidaceae, &c. 



Hibiscadelphus Rock. Malvaceae (4). 3 Hawaiian Is. 



Hibiscus L. (excl. Abelmoschm Medic.). Malvaceae (4). 160 trop. 

 and subtrop. The 5 ante-sepalous sta. are repres. by teeth at the 

 top of the stamen-tube. Several are cult., esp. H. Rosa-sinensis L. 

 (shoe-flower, fls. showy), H. Sabdariffa L. (Rozelle, fr. for jelly, 

 &c.), H. (A.) esculentus L. (Okra or Bandakai, mucilaginous young 

 fr. in soups, c.). 



Hickory, Carya. 



Hicksbeachia F. Muell. Proteaceae (n). i Austr. 



Hicoria Rafin. = Carya Nutt. (Jugland.). 



Hidalgoa La Llave. Compositae (5). 2 W.I., C. Am. 



Hiemalis (Lat.), winter. 



Hieracium (Tourn.) L. Compositae (13). 450 *_, S. Afr., Andes; 

 several in Brit, (hawk-weeds). Innumerable varieties have been 

 raised by various botanists to specific rank (see London Cat. of Brit. 

 Plants). Some are parthenogenetic. 



