MALPIGHIACEAE. 203 



3. KALLSTROEMIA Scop. Int. 212. 1777. 



Mostly annual pubescent herbs, with opposite stipulate, evenly pinnate 

 leaves, and solitary axillary peduncled yellow flowers. Sepals usually 5. Petals 

 the same number, obovate or oblanceolate, deciduous. Stamens twice as many 

 as the petals. Ovary sessile, 10-12-eelled; ovule 1 in each cavity, pendulous; 

 style long, or short, 10-12-grooved, persistent; stigma mostly 10-12-ridged. 

 Fruit 10-12-lobed, not spiny, often tubercled, splitting into 10-12 1-seeded 

 segments. [In honor of Kallstroem.] About 20 species, widely distributed in 

 warm and tropical regions. Type species: Trilulus maximus L. 



1. Kallstroemia maxima (L.) T. & G. PI. K A. 1: 213. 1838. 

 Tribulus maximus L. Sp. PI. 386. 1753. 



Branches slender, prostrate, 1.5-4.5 dm. long. Leaves short-petioled; 

 stipules subulate; leaflets 3-5 pairs, oval or oblong, inequilateral, rounded or 

 subcordate at the base, 8-20 mm. long; peduncles slender, 1.2-5 cm. long in 

 fruit; flowers 2.5 cm. broad, or less; sepals linear-lanceolate, very pubescent, 

 persistent, shorter than the petals; fruit ovoid-conic, about 6 mm. in diameter, 

 about as long as the stout persistent style, the segments tubercled. 



A weed in waste and cultivated soils, New Providence and Fortune Island : 

 Georgia and Florida ; West Indies ; Mexico to Colombia. GREATER CALTROP. 



Family 5. MALPIGHIACEAE Vent. 

 MALPIGHIA FAMILY. 



Shrubs, trees or woody vines, mostly with opposite leaves, and perfect 

 clustered, or sometimes solitary, nearly regular flowers. Calyx of 5, usu- 

 ally glandular sepals. Corolla of 5, usually clawed petals. Stamens 5 or 

 10; filaments united below, or distinct. Ovary sessile, mostly 3-carpellary ; 

 styles distinct or united; stigmas minute. Fruit various. About 60 gen- 

 era, including over 700 species, natives of tropical and subtropical regions. 



Fruit nut-like, winged, laterally attached to the pyramidal receptacle. 

 Mature carpels winged all around, the wings lobed, the 



body crestless. 1. Triopteris. 



Mature carpels winged dorsally, the wings entire, the body 



crested. 2. Stigmaphyllon. 



Fruit fleshy, wingless, basally attached to the flat or hollow 



receptacle. 

 Styles distinct. 



Inflorescence congested ; stigmas thick. 3. Malpighia. 



Inflorescence elongated ; stigmas subulate. 4. Byrsonima. 



Styles united. 5. Bunchosia. 



1. TKIOPTERIS L. Sp. PI. 428. 1753. 



Vines, glabrous or nearly so, twining or reclining, with opposite coriaceous, 

 mostly shining, short-petioled leaves, and small clustered flowers. Eeceptacle 

 pyramidal. Calyx 8-glandular, the broad sepals persistent. Petals 5, the 

 blades usually undulate. Stamens 10, all antherif erous j filaments subulate; 

 anthers very short. Ovary 3-lobed; styles 3, distinct, nearly equal. Samaras 

 3 together, each 3 -winged, Y-shaped, the two upper wings longer than the 

 lower one. [Greek, three wings.] About 4 species, natives of the West 

 Indies. Type species: Triopteris jamaicensis L. 



