CITRtfS 147 



cymose. ? fi. with peculiar zygomorphic structure; cpl. one, witli 

 one sepal and two petals at one side of it. Petals often united. 



Cissus L. (FiVzV Tourn. BH.}. Vitaceae. 275 trop. 



Cistaceae (EP., Cistineae BH.}. Dicots. (Archichl. Parietales EP., 

 BH.}. 4 gen., i6osp., in dry sunny places, esp. on chalky or sandy 

 soil, a few in S. Am., the rest N. temp. (esp. Medit. ) Shrubs and 

 herbs with opp. rarely alt. leaves, often inrolled (cf. Ericaceae), with 

 or without stipules. Glandular hairs usu. present. Fls. sol. or in 

 cymose infl., 5 , reg. K 5, the two outer usu. smaller than the inner 

 (sometimes regarded as bracteoles, but these are found lower down) ; 

 C 5 or 3 or o, conv. (the petals overlap to right or left according as 

 the 3 inner sepals overlap to left or right) ; A QO on a sub-ovarial 

 disc (sta. developed in descending order); G (5 10 or 3) i-loc. with 

 parietal (often projecting) plac. ; ov. oo or 2 on each, ascending, 

 orthotr. ; styles free. Caps, loculic. Endosp. ; curved embryo. 

 Genera: Cistus (ovules oo , capsule j-valved), Helianthemum (do., 

 3-valved), Hudsonia (ovules 2, pets. 5), Lechea (do., pets. 3 or o). 



Cistanche Hoffmgg. et Link. Orobanchaceae. 12 |^=. 



Cistanthera K. Schum. Tiliaceae. 3 trop. Afr. 



Cistiflorae (Warming). The loth cohort of Choripetalae. 



Cistineae (Bff.) = Cistaceae. 



Cistula Nor. Inc. sed. Nomen. 



Cistus (Tourn.) L. Cistaceae. 35 Medit. C. cretictts L. and C. 

 ladanifems L. yield the resin ladanum (not laudanum), formerly offic. 

 Many favourite cool-house shrubs (gum-cistus). 



Citharella Nor. Inc. sed. Nomen. 



Cithareloma Bunge. Cruciferae (4). 2 Turkestan. 



Citharexylum Mill. Verbenaceae (i). 35 warm Am. The common 

 name fiddle-wood is a corruption of Bois-fidele. 



Citriobatus A. Cunn. Pittosporaceae. 2 S.W. Austr. 



Citriosma Ruiz et Pav. = Siparuna Aubl. (Monim.). 



Citron, Citrus medica L. 



Citronella oil, Cymbopogon Nardus Rendle, C. Winterianus Jowitt. 



Citropsis Swingle et Kellermann (Lt mania p.p.). Rutaceae (v). 

 4 trop. Afr. 



Citrullus Forsk. Cucurbitaceae (3). 4 ;=&. C. vnlgaris Schrad. (water- 

 melon), C. Colocynthis Schrad. (colocynth), fr. a drug. 



Citrus L. Rutaceae (v). 10 sp. trop. Old World. Shrubs and trees 

 with usu. simple L, which show a joint at the meeting place of blade 

 and stalk, indicating their derivation from cpd. 1. like those of most of 

 the fam. (cf. Berberis). Axillary thorns in some ( = metamorphosed 

 1. of the branch shoot). Fls. in corymbs, 5 . K and C 4 8 ; A oo 

 in irreg. bundles, corresp. to an outer whorl only ; G (oo ) (6 or more). 

 A second whorl sometimes appears. Fr. a berry with leathery epicarp, 

 the flesh made up of large cells which grow out from the inner layer 

 of the pericarp. 



Many cult, in warm countries, esp. California, the W. Indies, Brazil, 

 the Medit. region, &c., for their fr. C. Medica L., the citron, is the 

 parent sp. of several varieties, e.g. var. Liinonum the lemon, var acida 

 the lime, var. Limefla the sweet lime. C. Aurantium L. is the orange, 

 with its vars. Bergamia, the Bergamot orange (from which the 



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