436 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Sophora conzattii Standi., sp. nov. 



Type from Cerro Espino, Distrito de Pochutla, Oaxaca, altitude 1,200 meters 

 (ConzaHi, Reko d Makrinius 3171; U. S. Nat. Herb. no. 763856). 



Tree, the young branchlets puberulent; leaves persistent, the rachis 9.5 to 13 

 cm. long, puberulent at first but soon glabrate, the petiolules 2 mm. long ; leaflets 

 7 or 9, oval or elliptic-oval, 3.5 to 5.5 cm. long, 2.2 to 3.5 cm. wide, rounded at 

 base, rounded or very obtuse at apex, coriaceous, bright green, lustrous, glab- 

 rous, the venation prominent and reticulate on both surfaces ; racemes about 

 5.5 cm. long, few-flowered, the rachis and pedicels minutely sericeous, the pedi- 

 cels 6 to 8 mm. long, the flowers violet ; calyx 6 nun. long and 8 mm. broad, 

 minutely sericeous, the limb oblique, truncate or subundulate; petals glabrous, 

 the standard 2.8 cm. long its claw 4 to 5 mm. long, the blades of the other petals 

 about 18 mm. long ; stamens glabrous ; ovary densely sericeous. " Frijolillo." 



6. ORMOSIA .Jack, Trans. Linn. Soc. Bot. 10:360. 1825. 

 1. Ormosia mexicana Standi., sp. nov. 



Type from Zacuapa:i, Veracruz {Ptirpiis 6326; U. S. Nat. Herb. no. 566950). 



Leaves large, brown-tomentose, finally glabrate, the petiolules stout, 7 mm. 

 long; leaflets 13, oblong, oblanceolate-obloug, or ovate, 8 to 17 cm. long, 4.5 to 

 5.5 cm. wide, obtuse or rounded at the more or less unequal base, obtuse or 

 acutish at apex, thin, green and glabrate on the upper surface, minutely pilose 

 beneath with yellow hairs; racemes 10 to 17 cm. long, paniculate, the branches 

 densely brown-tomeiitulose, the bracts and bractlets linear or lanceolate, 7 mm. 

 long or shorter, subpersistent ; calyx 1 cm. long, brown-tomeutulose, the lobes 

 about as long as the tube, lauce-oblong, acute or acuminate ; petals tomentuiose 

 outside, the s-tandard short-clawed, 13 mm. long, 10 mm. wide; ovary densely 

 brown-pilose, 3 or 4-ovulute. 



No species of this genus has been reported previously from Mexico, and only 

 two are recorded from Central America, both from Panama. O. hwxicana is 

 clearly district from the Panaman species. It resembles somewhat Dussia 

 martinicensis Krug & Urban, of the Lesser Antilles, but the leaflets are so differ- 

 ent that it may scarcely be referred to that species. The flowers, too, are smaller 

 than in the Martinique plant. 



7. XYLOTHERMIA Greene, Pittonia 2: 188. 1891, 

 1, Xylothermia montana (Nutt.) Greene, Pittonia 2: 188. 1891. 



Pickeringia montana Nutt.; Torr. & Gray, Fl. N. Amer. 1: 389. 1840. 



Xylothermia montana tomentosa Abrams, Bull. Torrey Club 34: 263. 1907. 



California, the type from Santa Barbara ; probably extending to northern 

 Baja California, 



Erect shrub with spinose branches; leaves sessile, digitately trifoliolate or 

 unifoliolate, the leaflets elliptic or obovate, 1 to 2 cm. long ; flowers reddish 

 purple, nearly 2 cm. long, in short racemes ; fruit linear, flat. 



8. CROTALARIA L. Sp. PI. 714. 1753. 



Low erect shrubs, unarmeil ; leaves digitately trifoliolate or sometimes sim- 

 ple; flowers usually yellow, racemose; fruit short, inflated, bivalvate. 



A number of herbaceous species occur in Mexico. Those listed here are more 

 properly herbs than shrubs, but they are frequently suffrutescent. The seeds 

 rattle about in the inflated fruit, giving the effect of a rattlebox, hence the 

 generic name. The plants of the genus are of little economic importance, 

 although some are of value for forage. Some species are cultivated in India 

 for their fiber, which is of good quality. 

 Leaves simple 1. C. schiedeana. 



