320 HE LINUS 



Helinus E. Mey. ex Endl. Rhamnaceae. 4 palaeotrop. 



Helio- (Gr- pref.), sun- ; -trope, Heliotropium ; -tropism, irritability to 

 light ; winter -trope, Petasiles. 



Heliocarpus L. Tiliaceae. 5 Mexico to Paraguay. 



Heliocaxya Bunge. Boraginaceae (iv. i). i Persia. 



Heliocereus Britton et Rose (Cereus p.p.). Cactaceae (in. i). 4 N. 

 Am 



Heliophila Burm. f. ex L. Cruciferae (i). 70 S. Afr. 



Heliophytum DC. = Heliotropium L. p.p. (Boragin.). 



Heliopsis Pers. Compositae (5). 7 Am. 



Heliosperma ReichL. (Silene p.p. BH.). Caryophyllaceae (u. i). 

 5 Mountains of S. Eur. 



Heliotropium (Tourn.) L. Boraginaceae (in). 220 trop. and temp. 

 H. peruviamim L. (cherry pie) and others (heliotrope) cult perf. fls. 



Helipterum UC. Compositae (4). 50 Austr., S. Afr. Xero. with 

 persistent invol. of white scaly bracts. Cult. orn. fl. ; the dried 

 flower-heads are sold as 'everlastings' (cf. Helichrysum, &c.). 



Hellebore, Helleborus ; white -, Veratrutn. 



Helleborine Tourn. ex Hall, Pers. = Serapias L. (Orchid.). 



Helleborine Hill (Epipactls p.p.). Orchidaceae (il. 2). 10 N. temp. 



Helleborine, Epipactis. 



Helleborus (Tourn.) L. Ranunculaceae (2). 15 Eur., Medit. ; 2 in 

 Brit, (hellebore). PI. woody below, each shoot from the stock 

 taking several years to reach maturity and flower. Fl. protog., 

 opening early in the year. Cpls. slightly coherent at base. In H. 

 tiiger L. (Christmas rose) the P turns green after the fl. has been fert. 



Hellenia Willd. Alpinia L. (Zingib. ). 



Helleranthus Small {Verbena p.p.). Verbenaceae (i). i N. Am. 



Hellwigia Warb (Alpinia. p.p.). Zingiberaceae (i). i New Guinea. 



Helmholtzia F. Muell. Philydraceae. 2 E. Austr., Polynesia. 



Helmia Kunth=Dioscorea L. p.p. (Dioscor.). 



Helminthia Juss. = Picris L. p.p. (Comp.). 



Helminthocarpum A. Rich. Leguminosae (in. 5). i Abyssinia. 



Helminthostachys Kaulf. Ophioglossaceae. i, H. zeylamca Hook, 

 f., Ceylon, Himal. to Queensland. Rhiz. dorsiv. with 2-ranked 1. 

 on the upper side, and roots below, which do not bear any definite 

 relation to the 1. Sporangia peltate, on -vsporangiophores from the 

 sides of the fertile spike. [Cf. Fanner and Freeman, in Ann. of 

 Bot. xin. 1899, p. 421 ; Lang on prothallus, do. xvi. 1902, p. 23.] 



Helmontia Cogn. Cucurbitaceae (2). 2 Brazil, Guiana. 



Helobieae. The 2nd order of Monocotyledons. 



Helodea Reichb. = Elodea Michx. (Hydrocharit.). 



Helodrium (Cl.), a thicket formation. 



Helogyne Nutt. Compositae (2). 2 Peru, Bolivia. 



Helonias L. Liliaceae (i). i east N. Am. Cult. orn. fl. 



Heloniopsis A. Gray. Liliaceae (i). 4 Japan, Formosa. 



Helopus Trin. = Eriochloa H. B. et K. (Gram.). 



Helosciadium Koch = Apium Tourn. p.p. (Umbellif.). 



Helosis Rich. Balanophoraceae. 3 trop. Am. 



Helwingia Willd. Cornaceae (Araliac. BH.). 3 Himal. to Japan. 



Helxine L. = Polygonum Tourn. (.5//.) = Fagopyrum Moench. 



