STANDLEY TEEES AND SHRUBS OF MEXICO. 509 



Leaflets usually 7 ; standard petal sericeous. 



Leaflets acuminate 1. D. inundatus. 



Leaflets rounded at apex 2. D. lunatus. 



Leaflets 25 to 30; standard petal glabrous 3. D. mucronulatus. 



1. Drepanocarpus inundatus Mart. ; Benth. Ann. Naturhist. Hofmus. Wien 



2: 96. 1838. 

 Veracruz and Chiapas. Central America to Brazil. 



Shrub, usually scandent ; leaflets 5 to 9, ovate to lance-oblong, 4 to 8 cm. long, 

 glabrous or nearly so ; flowers sessile. 



2. Drepanocarpus lunatus (L. f.) Meyer, Prim. Fl. Esseq. 238. 1818. 

 Pterocarpus lunatus L. f. Suppl. PI. 317. 1781. 



Reported from Veracruz. Central America, West Indies, South America, and 

 western Africa. 



Shrub, 2 to 5 meters high, armed with short recurved spines; leaflets oblong, 

 1.5 to 5 cm. long, with very numerous fine close nerves ; flowers purple ; fruit flat, 

 short, strongly curved. Known in Porto Rico as " escambron " or " palo de hoz." 



3. Drepanocarpus mucronulatus Benth. ; Hemsl. Diag. PI. Mex. 8. 1878. 

 Known only from the type locality, Bolanos, Jalisco. 



Leaflets oblong, 6 to 10 mm. long, mucronate, hirsute beneath ; flowers short- 

 pedicellate, 5 to 6 mm. long. 



Of this Hemsley says, " A very distinct plant, perhaps the type of a new genus." 

 DOUBTFUL SPECIES. 



Drepanocarpus ? cyathiformis DC. Prodr. 2: 420. 1825. Described from some- 

 where in Mexico. Probably a synonym of Dalbergia monetaria L. f., which is not 

 known to occur in Mexico. 



52. MACHAERIUM Pers. Syn. PI. 2: 276. 1807. 

 Scandent shrubs or erect trees, usually armed with spines ; leaves pinnate ; 

 flowers small or of medium size, racemose or paniculate ; fruit compressed, 

 samara-like, 1-seeded, indehiscent. 



Some of the South American species yield valuable wood which forms part of 

 the rosewood of commerce. 



Leaflets acuminate, elliptic or ovate 1. M. latifolium. 



Leaflets rounded or retuse at the apex, oblong or obovate-oblong. 



Leaflets 5 to 9 4. M. riparium. 



Leaflets more than 9 in most of the leaves. 



Inflorescence puberulent or with minute appressed hairs ; leaflets mostly 1.5 



to 2 cm. wide 2. M. biovulatum. 



Inflorescence setulose-pilose with stiff yellowish hairs ; leaflets 6 to 8 mm. 

 wide 3. M. setulosum. 



1. Machaerium latifolium (Benth.) Pittier, Contr. U. S. Nat. Herb. 20: 470. 



1921. 

 Machaerinm acutninatum latifolium Benth. Journ. Linn. Soc. Bot. 4: Suppl. 6a, 



1860. 

 Veracruz. Nicaragua and Costa Rica. 



Shrub, probably scandent ; leaflets 5 or 7, elliptic, 5 to 12 cm. long, glabrate ; 

 fruit 7 to 8 cm. long, glabrous, the thin wing 2 cm. wide or wider. 



2. Machaerium biovulatum JNIicheli, Mem. Soc. Phys. Hist. Nat. Gen&ve 34: 265. 



pl. 15. 1903. 



Michoacan to Oaxaca ; type from El Ocote. Guatemala. 



Large scandent shrub, armed with short recurved spines ; leaflets 3 to 5 cm. 

 long, bright green, pale beneath, with numerous fine close nerves ; flowers violet ; 

 fruit 5 to 6 cm. long, the wing 1.2 to 1.5 cm. wide. 



It may be that two species are represented by the material leferred here. 



