132 OXALIDE.E. 



All organs abound in oil-glands, and several volatile oils occur in Citrus. The berry is 

 often eatable, and in some varieties of Citrus contains citric acid, or a bitter principle. 



1. CITRUS, L. 



Calyx 5 (-3) -fid. Petals 5 (-8). Stamens polyadelphous. Ovary many-celled : ovules 

 biseriate. — Leaves unifoliolate, articulated with the petiole. 

 . 1*. C medica, L. Leaves glabrous : petiole naked or marginate ; berry ■umbonate, 

 acid, usually bright-yellow. 



o. Berry ovoid-oblong, tubercled, slightly acid. — Desc. Fl.§.t. 339. 



/3. Limonum, Riss. Berry ovoid, rugulose, acid. — Tuss. Fl. 3. t. 19; Desc. Fl. 5. 

 L 337. 



7. Peretta, Riss. Berry obovoid, with the style usually persistent, slightly acid. — Tuss. 

 Fl. 3. t. 16. 



Hab. Naturalized in Jamaica, and in the Caribbean Islands ! ; [East Indies]. 



2. C. Aurantium, L. Leaves glabrous : petiole icing ed ; berry globose, exumbonate. 



a*. Berry large, orange-coloured, sweet : oil-glands convex. — Tuss. Fl. 3. t. 14 ; Desc. 

 Fl. 5. t. 338. — C. Paradisi, Mac/.: a form with Jarger berries. 



/3*. Bigaradia, Duh. Berry large, orange-coloured, rugulose, bitter and acid : oil-glands 

 concave.— Tuss. Fl. 3. I. 15; Desc. Fl. 1. *. 38; 5. t. 357. 



7. spinosissima, Mey. ! Berry small (about 1" diam.), smooth, bright-yellow, very acid: 

 oil-glands concave. — Desc. Fl. l.t. 7. — C. Lima, Mac/. — A spiny shrub ; leaves crenate. 



Hab. a and f3, naturalized in Jamaica, and in the Caribbean Islands ; 7, said to be 

 indigenous and more common : Jamaica !, Dist. ; [Cuba !, Guadeloupe !, Mexico !, Venezuela!, 

 Guiana !]. 



3*. C. de cum ana, L.j Leaves puberulous beneath, slightly dotted : petiole winged ; 

 berry large, obovoid-globose, . depressed at the top, bright-yellow, or green: oil-glands flat 

 or convex.— Tuss. Fl. 3. t. 17, 18; Desc. Fl. 3. t. 220.— Young shoots puberulous; berry 

 about 5" diam. — Hab. Naturalized in Jamaica and in the Caribbean Islands ! ; [East 

 Indies!]. 



Several other East Indian Aurantiacece have been introduced into the British West 

 Indies, and are common in gardens, viz. Triphasia trifoliata, DC. ; Glycosmis citrifolia, 

 Lindl. {G. heterophylla, Rich. Cub.) ; Murraya exotica, L. ; Cookia punctata, Retz ; and 

 Citrus chinensis, Riss. {Desc. Fl. 3. t. 219). 



XLVI. GERANIACEiE. 



Sepals 5, mostly distinct. Stamens usually monadelphous, and biseriate. Pistil syn- 

 carpous : styles adnate to the prolonged axis, at length together with the 5 monospermous 

 carpids distinct. Embryo exalbuminous, curved. — Herbs or shrubs ; leaves simple, usually 

 palmatifid, stipulate ; nodes tumid. 



1*. GERANIUM, Z. 



Stamens 10, monadelphous. Styles at length revolute. — Herbs. 



1*. G. pyrenaicum, L. Perennial ; leaves palmatipartite-ronndish ; petals purple, 

 bearded at the base, exceeding the mucronate sepals ; carpids smooth, pubescent : seeds 

 smooth. — Hab. Naturalized in the Blue Mountains of Jamaica!, Al., at Abbey-green; 

 [introduced from Europe]. 





XLVII. OXALIDE^. 



Petals 5, twisted. Stamens 10, usually shortly monadelphous. Pistil syncarpous: 

 styles 5, distinct. Embryo straight : cotyledons foliaceous ; albumen thin. — Leaves com- 

 pound. 



Acid oxalates are general in the herbage. 



