OR O BANG HA CEAE 4 7 3 



Oricia Pierre. Rutaceae (iv). 3 trop. Afr. 



Orientate (Lat.), eastern. 



Orientation, definite position with regard to stimuli. 



Origanum Tourn. ex L. Labiatae (vr). 7 Eur., Medit. O. vitlgare 



L. (marjoram) in Brit., used as a flavouring herb. O. Majorana L. 



yields oil of marjoram by distillation. 

 Orites R. Br. Proteaceae (n). 6 temp. E. Austr. 

 Oritrephes Ridl. Melastomaceae (i). i Malay Peninsula. 

 Orixa Thunb. \Celastrus p.p. BH.}. Rutaceae (i). i Japan. 

 Orlaya Hoffm. (Daunts p.p. BH.}. Umbelliferae (171/2). i Medit. 

 Orleanisia Barb. Rodr. Orchidaceae (n. 6). i Brazil. 

 Ormocarpum Beauv. (Diphaca Lour.). Leguminosae (in. 7). 10 trop. 



and subtrop. |%. 



Ormosciadium Boiss. Umbelliferae (in. 6). i W. As. 

 Ormosia Jacks. Leguminosae (ill. i). 25 trop. The seeds of 0. 



dasycarpa Jacks, (bead or necklace tree) show the same red and black 



surface as Abrus precatorius. 

 Ornamental plants, whether cult, for fl., fr. or 1., or as ornamental 



shrubs or trees,, are very numerous, and cannot be listed. Against 



most important genera thus employed are placed such notes as "cult. 



orn. fl." So far as the cold zones are concerned they may be roughly 



classified into hardy pi., which will stand the winter out of doors, 



half-hardy, which require protection during winter, or if annual to be 



germinated under glass and planted out, cool house plants from warmer 



climates than England, succitlent house plants from dry climates, and 



stove plants from hot moist trop. climates. Or in another way, they 



may be grouped into ornamental trees, shrubs, and herbs, with the 



minor groups of water-plants, climbers, &c. 

 Ornanthes Rafin. =Fraxinus Tourn. (Olea.). 



Ornithidium Salisb. Orchidaceae (u. 1 8). 25 trop. Am., W.I. Cult. 

 Ornitho- (Gr. pref.), bird ; -phily, fert. by birds. 

 Ornithobaea Parish. Gesneriaceae (i). i S. Burma. 

 Ornithocarpa Rose. Cruciferae (3). i Mexico. 

 Ornithocephalus Hook. Orchidaceae (n. 19). 20 trop. Am., W.I. 

 Ornithochilus Wall, ex Lindl. Orchidaceae (n. 20). 2 E. As. 

 Ornithogalum (Tourn.) L. Liliaceae (v). 90 temp. |*. O. iirnbel- 



latum L. (star-of-Bethlehem) in Brit. 

 Ornithoglossum Salisb. Liliaceae (i). 2 S. Afr. 

 Ornithophora Barb. Rodr. (Sigmatostalix p.p. EP.}. Orchidaceae (n. 



19). i Brazil. 

 Ornitnopus L. Leguminosae (in. 7). 8 Medit., W. As., trop. Afr., 



S. Brazil. O. perpusillits L. in Brit, (bird's foot). O. sativns Brot. 



(seradella, serratella) affords good fodder. 

 Ornithostaphylos Small (Arctostaphylos p.p.). Ericaceae (11. 3). 



i Lower California. 



Ornithoxanthum Link = Gagea Salisb. (Lili.). 



Ornitrophe Comm. ex Juss. = Schmidelia L. (BH.}~ Allophylus L. 

 Ornus Neck. = Fraxinus Tourn. (Olea.). 

 Orobanchaceae (EP., BH.}. Dicots. (Sympet. Tubiflorae ; Personales 



BH.}. 12 gen., 140 sp., chiefly N. temp. %; a few Am. and trop. 



All are parasitic herbs with little or no chlorophyll, attached by 



