GuaiaciLin ZYGOPHYLLACE.E 163 



chiefly of the northern hemisphere, very rare in tropical Africa, 

 wanting in Further India ;md in the Malay Archipelago. 



Trees. Fruit fleshy at first, angled or winged... 1. Guaiacum. 

 Herbs. Fruit dry. 



Sepals deciduous. Fruit spiny 2. Tribulus. 



Sepals persistent. Fruit tuberculate 3. Kallstrocmia. 



1. GUAIACUM L. 



Trees or shrubs, with hard resinous wood ; twigs often with 

 swollen or jointed nodes. Leaves abruptly pinnate ; leaflets 

 leathery, in 2-1-4 pairs; stipules minute, caducous. Peduncles 

 1 -flowered, solitary or 2 or more, with minute deciduous bracts 



H 



at the base. Sepals unequal. Petals obovate. Ovary stalked, 

 2-(5) celled ; ovules 8-10 in each cell, pendulous. Fruit some- 

 what fleshy on the outside, composed of 2(-5) cocci ; cocci 

 angled or winged on the back, separating at length, 1 -seeded. 

 Endosperm horny, with chinks ; embryo straight ; cotyledons 

 leafy. 



Species 4, natives of tropical and subtropical America. 



G. offleinale L. Sp. PL 381 (1753); Tussac FL Ant. /r. t. 35; 

 Descourt. FL Ant. vii. t. 463 ; Wright Mem. 214 ; 3facf. Jam. I. 

 187 ; Bot, Beg. xxv. t, 9; Griseb. FL Br. W. Lid. 134 ; Berg <0 

 Schmidt Off. *Gei<: n. t. Ub ; BentL & Trim. Med. PL t. 41 ; 

 Cool- & Coll in Contrib. U.S. Nat. Herb. viii. 150; Urb. Symb. 

 Ant. Iv. 314 ; Vail in N. Amer. FL xxv. 105. G. jamaicense . . . 

 flore albo and G. jamaicense . . . flore subcaeruleo Pink. Plu/t. 

 t. 35, /. 34. G. flore etc. Plum. Noi: PL Amer. Gen. 39. Pruno 

 vel euonymo affinis &c. Shane Cat. 186 ife Hist. it. 133, /. 222, 

 /. 3-6. "G. foliis &c. Browne Hit. Jam. 225. (Fig. 52.) Speci- 

 men from Hort. Cliff, in Herb. 31us. Brit. ; and one from 

 Browne in Herb. Linn, named by Linnaeus. 



Lignum Vitse. 



Barliam in Herb. Sloane clxxxiv. 164 ! Sloanc Herb. vii. 78! Brov 

 Broughton\ Shakspcarl plains on the south side, Mac fad-yen ! St. Andrew, 

 -/.. \iibl Parnclll Purdicl Port Henderson, Land Prior ! March ! 

 Liguanea plain, J.P. 616, Morris ! Kingston, Hitchcock ; also Pla.i'toii ! and 

 ('lute'. Long Mountain road, Campbell ! also Harris] Fl. Jam. 6411, 

 639 (fls. white), 8640 (fls. blue). West Indies, northern S. America. 



Tree, usually not more tban 12-15 ft. high, with diameter not often 

 exceeding 1^ ft. Lcailet* in 2(-3) pairs, sessile, elliptical to obovatf- 

 elliptical, rarely oblanceolate-clliptical, glabrous, nerves and veins pro- 

 minulous on both sides, 1-5-5 cm. 1. ; stipules pubcrnlous, 1 mm. 1. 

 Peduncle* few or often cro.vded, as many as 10 in a cluster, axillary, at 

 ends of twigs, l'5-3 cm. 1. Scpalx 5, white-tomeutosc inside and out, 

 4-5 mm. 1., three outer broader and shorter than th.- rest. 7V/<//.s 5, blue, 

 rarely white, puberulous on the inside and sometimes on both sides at the 

 apex, 12 mm. 1. Stame)ix 10, 7-9 mm. 1. ; anthers nvurved after shedding 

 pollen. Fruit usually of 2 carpels, 1-5-2 cm. 1. and br., yellow, compressed, 



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