RUBIACEjE. 349 



+f Leaves rugose-veiny, shortly petioled. 



159. D. sarmentosa, Sw. Suffrutescent, flaccid-scandent ; stem obtusely tetragonal ; 

 leaves oblong-lanceolate, pointed, shortly petioled, rugose-veiny with 4-5-jugal, curved veins, 

 scabrous: stipular bristles setaceous -hairy; axils 5-fevv-flowered ; calyx-lobes 4, lanceolate, 

 one-half or one-third as long as the carpids; corolla-tube short, nearly as long as the 

 calyx-limb ; fruit ovoid-oblong, ecostate, glabrate, hard. — Spermacoce spinosa, Lafi. (non 

 Jacq., non Sic). Jacquin's species, called in his coloured edition S. havanensis, is probably 

 my Machaotiia microph'ylla, PI. "Wright, while neither Lcefling's nor Swartz's plants are 

 spiny. Borreria Perroletii, DC, according to Miquel's (not Bentham's) determination, is 

 also probably a synonym. — Often confounded with Borrera Bartlingiana, but easily dis- 

 tinguished by its impressed leaf-veins, and a true Diodia. Stem rough on the angles, usually 

 hairy or glabrescent; leaves lJ-"-l", stipular bristles about 2'" long; corolla white, IV" 

 long ; fruit perfectly smooth on the convex back of the carpids, 2'" long. — Hab. Jamaica !, 

 Bancr., Al., March, among shrubs, in arid soil ; Trinidad !, Or. ; [Guiana !, Brazil 1 to S. 

 Katherine!]. 



54. SPERMACOCE, L. 



Character of Diodia, but one of the two carpids dehiscent along the margin of the com- 

 missure, the other closed by the dissepiment. 



160. S. tenuior, Lam. {non L.). Annual; stem obtuse-angled, puberulous or gla- 

 brescent; leaves lanceolate (or lanceolate-linear), acuminate, scabrous above or near the 

 margin: stipular bristles filiform, longer than their sheath ; axils many (-few) -flowered; calyx- 

 teeth minute, deltoid, much shorter than the carpid, three on the closed, the fourth on the 

 open one, or obsolete ; fruit obovate-oblong : seeds minutely roughish. — SI. t. 94./. 2 ; Lam. 

 III. t. 94./. 1. — S. stricta, L. (non Roxb.) : from the cultivated plant. Borrera scxangularis, 

 Cham. Schlecht. I ex Sieb. Mart. 47 : a flaccid form, with broad, glabrescent leaves, arid 

 long petioles. S. longifolia, Bartl. ! : the same form. — I adopt Lamarck's name, though 

 Linnseus's original species (founded upon Dill. Elth. f. 359), from its habitat, would be S. 

 glabra, Mich. : for he confounded it with Loefling's homonym, which is probably Borrera 

 lavis, the obscure synonymy of which may so far be cleared up, that the latter has trars- 

 versely furrowed seeds. — Extremely variable ; seeds slightly rugulose with points and several 

 transverse wrinkles, but devoid of continuous furrows. — Hab. Jamaica !, M'Nab, Al., a weed ; 

 Antigua!, Wullschl., Trinidad ! ; [Cuba! and Mexico! to Brazil! and Peru!]. 



55. BORRERA, Mia. 



Character of Diodia, but both carpids equally dehiscent along the inner surface. — In- 

 florescence whorled and capitate, rarely cymose. 



Sect. 1. Hemimitea. — Capsule septicide above the middle, with the dissepiment persistent 



below it. 



161. B. lsevis, Gr. Annual, herbaceous or suffrutescent, glabrescent; stem subcylin- 

 drical or slightly angular; leaves elliptical-lanceolate or lanceolate, acuminate: veins 5-1- 

 jugal : stipular bristles setaceous, glabrous, shorter than, or as long as their produced 

 sheath ; flower-whorls and heads many-flowered ; calyx-teeth 4, minute, equa^ ovate, bluntish, 

 much shorter than the obovate-globose fruit ; seeds oblong, striated with tranverse furrow?. 

 — Lam. III. t. 94./. 2. — Spermacoce, Lam. (exclus. syn. SI.). S. tenuior, Sw. B. vaginata, 

 Cham. Schlecht. — Fruit I"' long, glabrescent. — Hab. Jamaica !, Wils., March, a common 

 weed in the Caribbean Islands ; S. Kitts !, Els., Antigua !, Wullschl., Dominica !, Imr., S. 

 Vincent !, Guild. ; Trinidad !, Lockh. ! [Cuba !, Portorico !, Guadeloupe !]. 



Sect. 2. Euborreea. — Capsule septicide to the base, with the dissepiment disappearing. 



162. B. parviflora, Mey. Annual, glabrescent ; stem tetragonal; leaves oblong-lan- 

 ceolate or elliptical, blunt or pointed, subsessile or shortly petioled : veins 5-jugal : stipular 

 bristles setaceous, longer than their sheath ; flower-whorls and heads many-flowered ; calyx- 

 teeth 4, lanceolate-subulate, nearly as long as the obovale fruit ; seeds minutely oblong, 

 scrobiculate. — Mey. Esseq. t. 1. fig. sin. 1-3: the fruit. — Spermacoce birta, Sw. (Milra- 

 carpum, DC.).— Very variable; leaves l"-6'" (sometimes 2"-4'") long; heads 2"'-3"' diain. 



2 a 2 



