322 CITRON 



during the summer all cultivation is stopped, and grass, 

 beggar-weed, or field-peas allowed to cover the ground, 

 preventing sunburning and providing a source of 

 humus so necessary in keeping up proper fertility and 

 texture of the sandy soil of Florida. 



E. N. Reasoneb. 



CITEtfLLUS (from Citrus). CucurbMcem. The ge- 

 nus which includes the Watermelon. Cogniaux, the 

 latest monographer (DC. Monogr. Phaner. 3), recog- 

 nizes throe species, all of the Old World, with the larg- 



Colccynthis, S.-hr.-ul., is tin- (_'o|,.r . 

 fruit of which furnishes awell-kn 

 It is native to the Mediterranc:M 

 Africa. The fruit is small and ;j 

 smooth and partly colored, the He 

 deeply divided. 



listed in trade catidugues undt-r thi' nanies Lim'.iini Iri- 

 foliala and Triphania anraiiiiola. These are tender. 



small trees, nn 

 less winged i 

 (appearing as 

 shown liv Hm- 



Fig. 47:^ ' 



calyx .'ii . li ,: 

 thick, -I >'i.iii 

 meroiis, _'ii iM. 

 less united ; 

 composed of i 

 style and stigi: 

 in each cariiil 

 long or |H .11 I 

 numeriiii 



contain 1 11 ' ■■ 



aubtn.ui^Ml A 



. with a single 

 ' Mta; ovules 4-8 

 fr. a round, ob- 

 rind, containing 

 pulp : seeds 

 cry coats, frequently 

 vative of tropical and 

 ,,... ,.,:t,.n«iv,.1yculti- 



cells cl,-\r|,,|iii,- 1,1 II, ,. ■r. ■ . ;: '■ ._'l,i-, l,.inf< an 



Lime, Oranije, Ponwlo. 



A. PSEnDO-.a:GLE.— ivs. trifoliolate, deciduous, with 

 elliptical, dentate or crenate Ifts.: fls. white, 1-2 in 

 the axil of each leaf, opening before the !vs. appear 

 ill spring ; petals spatulate: ovary and disk 



be 



ifused with the 



AA. KvciTRVS. — lJvs. \inifoliolate, evergreen : petals 



oblong: ovary and disk glabrous. 

 Aurdntium, Linn. {O. vn'iifli-is, Rissm. Oeanoe. 

 Figs. 476,480. A small tree ,,r ii,i,li: \..nirs slmots light 

 green, glabrous : Ivs. elli|,ii< :il 1 , ■ ,!■ ,iii'. obtuse, 

 or acuminate; petiole narr,,\,; ,: AiiiLred: fls. 



hermaphrodite, pure white: ti . iiil,! -i'li, ii,':il or ellip- 

 tical, not mamillate. 



Var. am4ra, Linn. (C. BigarMia, Duham.). Sour, 

 Bitter, or Seville Okange. Lvs. deep green, ovate, 

 pointed, '-err aroniatio ; pi'ti.,!,- broadly wing-mar- 

 ' ■ jund, dark orange, 



■matic; rind some- 

 Southeastern Asia, 

 regions throughout 

 ivated sorts of this 

 United States, and 



gined: 



frequent I > , m , 



what roiml, : in p • ,. 



and cult, in t,,,|ii.Ml :iii 



the world.- riu-re are 



variety or subspecies 



of these only the two following are well krown : Sour 



{"sour orange"): Fr. deep orange or orange-red ; pulp 



very sour. This is grown very extensively as a stock on 



\vlii,-l. To bud varieties of the sweet orange, lemon, 



l-,,,,,, 1>,. I'tc. Very valuable as a stock because resistant 



to 111, ^.rious disease mal-di-gomma or foot-rot. — Bitter 



S«, I I : I'r. ,,f s.iim- ixtiriial aiipearance as the Sour 



, ,,,,,,. i.l.l ,,,ll,||, :,r;,| ;,|„| |,h :,^;,|,t tothctaStO. Cultl- 



! ' i I , , M . >"ur Orange was evi- 



' . ; . ■: i: .' I > early by the Span- 



mg 



lab- 



Lchout the 



is worthless as a whole, but is sometimes used for pre- 

 serves. The plant is largely used for hedges, for which 

 it is well adapted, forming a close, compact growth that 

 nothing can penetrate. It is also used as a hardy stock 

 on which to bud certain oranges and lemons, particu- 

 larly the Satsuma and Kumquat. It is said to have the 

 effect of somewhat dwarfing the more robust orange va- 



I,;ii_'i' r|ii:,,i, ,, I, - Ml,.;! i,ir perfume are manufactured 

 fr,in, il,, li-, ,,i --nil,, II, France. The fr. is used for 

 niannalii,!,'. ami nialifs a very refreshing drink known in 

 Florida as "orangeade." 



Var. Bergimia, Wight. & Am. Bergamot Orange. 

 A bush or small tree : lvs. oblong ; petiole wing-mar- 



