OREO] 



(JDIje Euuguty of SStitang. 



822 



green and dried, looks like vellum, and 

 bears ink on one side. The heart of young 

 leaves, or cabbage, is boiled as a vegetable 

 or pickled, and the pith affords sago. Oil 

 is obtained from the fruit. [A. S.] 



OREORCHIS. A genus of terrestrial 

 orchids founded on the Corallorhiza foliosa 

 of Lindley, a plant inhabiting mountain 

 meadows in the north of India. The spe- 

 cies are tuberous plants with grass-like 

 leaves, small red or red-and-white flowers, 

 and with the appearance of small Eulophias, 

 from which the genus differs especially in 

 having four distinct globular pollen-mass- 

 es. Four species are known : O. foliosa 

 and micrantha from the Himalayan moun- 

 tains, O. patens from Siberia, and 0. Ian- 

 cifolia from Japan. 



OREOSERIS. A name given by De Can- 

 dolle to three Himalayan species of Gerbera, 

 which have since been reunited with that 

 genus. 



ORGANOGENESIS. The gradual forma- 

 tion of an organ from its earliest appear- 

 ance. 



ORGANOGRAPHY. The study of the 

 structure of the organs of plants. 



ORGANY. Origanum vulgare. 



ORGE. (Fr.) Hordeum. — CARREE, 

 or D'HIVER. Hordeum hexastichon. — 

 ELYME. Hordeum sylvaticum. — EN 

 EVENT AIL, or PYRAMID ALE. Hordeum 

 Zeocriton. 



ORGIBAO. An American name for Sta- 

 cliytarpha jamaicensis. 



ORGYA (adj. ORGYALIS). Six feet, or 

 the ordinary height of a man. 



ORIGAN. (Fr.) Origanum vulgare. 



ORIGANUM. This name is derived from 

 two Greek words, oros mountain, and ganos 

 joy, in allusion to the gay appearance 

 they give to the hillsides on which they 

 grow. Botanically it is applied to a genus 

 of Labiato3, consisting of herbs or low 

 shrubs, with their flowers aggregated into 

 cylindrical or oblong spikes, and protected 

 by coloured bracts as long as or longer 

 than the calyx, which latter is tubular with 

 ten to thirteen ribs, and has a nearly regu- 

 larly five-toothed or sometimes two-lip- 

 ped limb and hairy throat ; the corolla 

 is slightly irregular; and the stamens 

 four, at a distance from each other. The 

 species are' natives of the Mediterranean 

 region, also of Northern India, &c. O. vul- 

 gare, the Wild Marjoram, is a common 

 plant in this country, especially in lime- 

 stone or chalky districts. Its stem is one 

 to two feet in height, with stalked ovate 

 acute leaves, and purplish or white flow- 

 ers, arranged in compact round heads at 

 the ends of the branches. The corolla Is 

 longer than the calyx, and the stamens 

 than the corolla. This plant yields an 

 'acrid stimulant oil, sold in the shops as 

 Oil of Thyme. It is used as a caustic by 

 farriers, and on similar grounds as an ap- 

 plication to decayed teeth. The plant has 



also been used for dyeing purposes. The 

 writer has on several occasions met with 

 a variety of this plant, with elongated cy- 

 lindrical spikes of flowers in place of the 

 usual globular heads. 



0. Onites and 0. Majorana are included 

 among seasoning herbs, under the name 

 of Marjoram : one or the other is supposed 

 to be the plant called Amaracus by Greek 

 writers. In addition to the species just 

 mentioned, others are cultivated in this 

 country as ornamental plants, such as 

 Dictamnus, the Dittany of Crete, which 

 has roundish leaves thickly invested with 

 white down, and flowers m drooping spikes; 

 and 0. sipyleum, which Is similar but taller 

 and less woolly, These last are popularly 

 called Hop plants, and are often seen in 

 cottage-windows. [M. T. M.J 



ORTTHYA. A genus of Liliacea?, found 

 in Eastern Europe and Middle Asia, closely 

 allied to Tulipa, of which it has the habit, 

 but differing in having the three inner 

 perianth leaves narrowed into a claw at the 

 base, and in possessing a distinct style. 

 From Ornithoga.lum, in which it was in- 

 cluded by Linnaeus, it differs not only in 

 habit, but by having the perianth decidu 

 ous. [J T. S.J 



ORME. (Fr.) TJlmus. — A TROIS 

 FEUILLES. Ptelea trifnliata. — BLANC. 

 Vlmus effusa. — A LIEGE. Vlmus sube-- 

 rosa. — DAMI5RIQUE. Guazzima tomen- 

 iosa. — DE SAMARIE. Ptelea trifoliata. 

 — DE SIBERIE. Planera Richardi. 



ORMENIS mixta, or Anthemis mixta, 

 a plant, of South Europe, having a great 

 resemblance to the chamomile, has along 

 with the latter been placed by Grenier 

 and Godron in Chamomilla, which they 

 distinguish from Anthemis by the cylin- 

 drical (not compressed) corolla tube en- 

 larged below, and the slightly compressed 

 achenes rounded at the summit and having 

 three slender ribs on their inner face. 

 From the common chamomile this plant is 

 chiefly distinguished by the remarkably 

 oblique base of the corolla tube. [A. A. B J 



ORMOCARPUM. A genus of Legumi- 

 nosa, of the suborder Papilionacea?, con- 

 sisting of three or four shrubs from tro- 

 pical Africa or the Indian Archipelago, very 

 nearly allied to JEschynomene, and chiefly 

 differing in the pod, of which the joints or 

 articles are marked by deep longitudinal 

 furrows, and usually covered with glandu- 

 lar warts. In two species the leaves are 

 reduced to a single rather large terminal 

 leaflet ; in the remaining one or two they 

 are pinnate with numerous small leaflets, 

 as in JEschynomene. 



ORMOSIA. A genus of papilionaceous 

 LeguminosK, chiefly tropicalAmeri can, with 

 one or two species from Hong Kong and 

 India. It consists of timber trees, with 



i pinnate leaves, and terminal panicles of 

 flowers, which have a bell-shaped calyx, a 

 pea-like corolla, ten distinct often unequal 

 stamens, and a style curved inwards at top 



I and bearing the stigma on one side. The 



