314 HALOGETON 



Halogeton C. A. Mey. Chenopodiaceae (B). 5 Medit., Centr. As. 

 H. sativits Moq. (barilla) used to be burnt in Spain, &c. , for soda. 



Halopegia K. Schum. Marantaceae. 4 palaeotrop. 



Halopeplis Bunge. Chenopodiaceae (A). 3 E. Medit., C. As. 



Halophila Thou. Hydrocharidaceae. 6 Indian and Pacific Oceans. 



Halophytes, cf. Halo-. 



Halophytum Spegazz. (Tetragonia p.p.). Chenopodiaceae (A), i 

 Patag. 



Halopyrum Stapf. Gramineae (10). i coast of Indian Ocean. 



Halorageae (BH.} = Haloragidaceae. 



Haloragidaceae (P., BH. incl. Callitrichaceae and Hippuridaceae). 

 Dicots. (Archichl. Myrtiflorae ; Rosales BH.}. 8 gen., 90 sp., 

 cosmop., chiefly Austr. Land, marsh, or water herbs or under- 

 shrubs, of various habit (see gen.), with great development of adv. 

 roots, opp., alt., or .whorled exstip. 1., and inconspic. fls., sol. or in 

 infl. The anatomy is of interest. Fl- g or unisexual, usu. bracte- 

 olate, reg., epig., usu. 4-merous. _ P in two whorls, or one, or 

 absent; A 8, obdipl., or fewer; 0(14); multiloc., with usu. i 

 pend. anatr. ov. in each loc. ; styles free. Nut or drupe. Embryo 

 straight, in endosp. Chief genera : Haloragis, Myriophyllum, Gun- 

 nera. Related to Onagraceae, as reduced forms. A gradual series 

 may be traced, from the very complete fl. of Myriophyllum or Halo- 

 ragis, down to that of Hippuridaceae. [Cf. Engler,Jahrb. 34, Beibl. 

 79.] [BH. chars, incl. other fains, mentioned.] 



Haloragis Forst. Haloragidaceae. 60 Austr., N.Z., Tasm., S.E. As., 

 N Am., large herbs in damp places. Fls. 4-merous, obdipl. 



Haloschoenus Nees = Rhynchospora Vahl p p. (Cyper.j. 



Halostachys C. A. Mey. Chenopodiaceae (A), i temp. Eur. and As. 



Haloxylon Bunge. Chenopodiaceae (B). 10 Medit. to India. Steppe 

 plants of curious habit (tig. in A'af. Pfl.}. 



Hamadryas Comm. ex Juss. Ranunculaceae (3). 5 Antarctic Am. 



Hamamelidaceae (EP., BH. incl. Myrothamnaceae). Dicots. (Archichl. 

 Resales). 18 gen., 50 sp. chiefly sub-trop. (N. and S.). The distr. 

 areas of the genera (q.v.} are extremely disjointed, a fact perhaps 

 due to the influence of the glacial period. Trees and shrubs with 

 alt., simple or palmate, slip. 1. Infl. racemose, often a spike or head, 

 frequently with an invol. of coloured bracts. Fl. $ or unisexual, 

 often apetalous, rarely naked, hypo- peri- or epigynous, usu. without 

 a disc. K 4 5, usu. imbr. ; C 4 5, open or valvate, the petals 

 often long and rolled up like a watch-spring in bud ; A 4 5 or rarely 

 fewer; G (2), usu. median, rarely obliquely placed, with 2 styles, 

 2-loc.; ovules i or more in each loc., pend., anatr., with ventral or 

 lateral raphe. Loculic. or septic, capsule. Exocarp woody, endo- 

 cap horny. Seed albuminous, with straight embryo. Some sp. yield 

 useful wood, resins, &c. Chief genera : Bucklandia, Liquidambar, 

 Altingia, Fothergilla, Hamamelis. Closely allied to Cunoniaceae, and 

 hence to Saxifragaceae. [BH. chars, incl. those of Myrothamnaceae.] 



Hamamelideae (Bll. ) = Hamamelidaceae. 



Hamamelis Gronov. ex L. Hamamelidaceae. 3, two in China and 

 Japan ; H. virginiana L. (witch-hazel, cult, orn.), in east N. Am. 

 It flowers in late autumn and ripens its fr. in the following year. 



