460 ODONTONEMELLA 



Odontonemella Lindau (Eranthemum p.p.). Acanth. (iv. B). 2 Indo- 

 mal. 



Odontonia x Rolfe. Orchidaceae. Hybrid, Odontoglossum-Miltonia. 



Odontonychia Small (Siphonychia p.p.). Caryoph. (i. 4). 2 N. Am. 



Odontosoria (Presl) Fee. Polypodiaceae. 20 trop. and subtrop., exc. 

 Afr. 



Odontospermum Neck. (incl. Asteriscus Moench). Compositae (4). 

 12 Medit. O. (A.) pygmaeitm O. Hoffm. is a xero. whose fr.-heads 

 close in dry weather (cf. Anastatica, Mesembryanthemum) ; the seeds 

 only escape in damp weather suitable for germination. 



Odontostelma Rendle (Schizoglossum EP.}. Asclep. (n. i). i Angola. 



Odontostomum Torr. Liliaceae (in) (Haemodor. BH.}. i California. 



Odontotecoma Bur. et K. Schum. (Tecama p.p.). Bignoniaceae (2). 

 i Brazil. 



OdontycMum K. Schum. (Hedychium p.p.). Zingiber (i). i Mai. Pen. 



Odostemon Rafin. (Berberis p.p.). Berberidaceae. 7 N. Am. 



Odyendea Engl. (Quassia p.p.). Simarubaceae. 2 trop. W. Afr. 



Oeceoclades Lindl.= Saccolabium Blume (Orchid.). 



Oecology, ecology. 



Oecopetalum Greenman et C. H. Thompson. Icacinaceae. i Mexico. 



Oedematopus Planch, et Triana (Havetiopsis BH.}. Guttiferae (v). 

 3 Amazon valley. 



Oedera L. Compositae (7). Cape Colony. 



Oegroe Phil. Compositae (inc. seel.), i Chili. 



Oenanthe (Tourn.) L. Umbelliferae (in. 5). 35 N. temp. \%. 7 in 

 Brit, (water drop-wort). 



Oenocarpus Mart. Palmaceae (iv. i). 8 N. S- Am. 



Oenone Tul. (Ligta Tul.). Podostemaceae. 8 Guiana, Brazil. 



Oenosciadium Pomel (Oenanthe p.p. EP.}, Umbellif. (in. 5). i N. 

 Afr. 



Oenothera L. (BH. incl. Godetia Spach, Onagra Tourn., Xylopleurum 

 Spach). Onagraceae (2). 30 Am. O. (Onagra) biennis L. (evening 

 primrose), &c., cult. orn. fl. The fls. of O. biennis emit scent at 

 evening and are visited by nocturnal moths, to which they are suited 

 by the long tubes. 



Oenotheraceae (Warming) = Onagraceae. 



Oenotheridium Keiche (Godetia p.p.). Onagraceae (2). i Chili. 



Oeonia (Aeonia} Lindl. Orchidaceae (n. 20). 5 Mascarene Is. 



Oeoniella Schlechter (Epidendritm p.p.). Orchid, (n. 6). 2 Madag., 

 Masc. 



Ofaiston Rafin. Chenopodiaceae (B). i W. As. 



Officinalis (Lat.), medicinal. 



Offset, a short runner, bending up at the end, Agave, Sempervivum. 



Oftia Adans. Myoporaceae. 2 S. Afr. 



Ogeechee lime (Am.), Nyssa. 



Oianthus Benth. Asclepiadaceae (n. 3). 3 India. 



-oides (Gr. suff.), -like. 



Oil occurs in plants in two forms, the fixed oils, or non-nitrogenous 

 reserves in seeds, and the volatile oils, which give the perfume to 

 many fls. and 1. The former are obtained by pressure, the latter by 

 distillation. Fixed oils from Alcnrites, Arachis (groundnut), Argania, 



