Vol. 32, pp. 189-194 September 30, 1919 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW PLANTS FROM SINALOA. 

 BY S. F. BLAKE. 



The following new species of plants have been found in a col- 

 lection from the District of San Ignacio, Sinaloa, Mexico, made 

 by Senor Antonio E. Salazar under the direction of Sefior Jesus 

 G. Ortega, head of the Department of Agriculture, Department 

 of Sinaloa and Nayarit. This collection has recently been sent 

 to the U. S. Department of Agriculture for determination. 



Polygala sinaloae, sp. nov. 



Slender annual; stems solitary, erect or ascending, sparsely branched, 1.1 

 to 1.6 dm. high, 5-angulate, papillose-roughened on the angles, glabrous; 

 leaves remote, whorled to middle of stem or higher, the two lowest whorls 

 in 2's or 3's, oval to elliptic, acute or cuspidulate, cuneateat base, 6to 12 mm. 

 long including the short petiole; one or two median whorls in 5 's, the blades 

 elliptic-linear, acuminate at each end, cuspidulate, glabrous, papillose- 

 roughened on margin, subsessile, 1 to 1.8 cm. long, 1.5 to 2.5 mm. wide; 

 those of the branchlets mostly scattered, linear, subulate-tipped, 4 to 8 mm. 

 long; peduncles 1 to 2 cm. long; racemes cylindric or conic, acute, rather 

 loosely flowered, 5 mm. thick, the axis becoming 1 to 2.5 cm. long; bracts 

 ovate, attenuate-tipped, deciduous, 1 mm. long; pedicels 0.8 mm. long; 

 flowers magenta-pink; upper sepal broadly oval, obtusely apiculate, 1- 

 nerved, sparsely stipitate-glandular-ciliate, 1 to 1.2 mm. long; lower sepals 

 ovate, acute or acuminate, sparsely stipitate-glandular-ciliate, 0.8 to 1 mm. 

 long; wings obovate, rounded at apex, 3-nerved, 2.8 mm. long, 1.4 mm. wide; 

 keel 2 mm. long, the crest of 4 pairs of lobes, the uppermost short, adnate, 

 emarginate, the 3 lower linear, papillose; upper petals oblong-ovate, trun- 

 cate, 4-veined, 2.2 mm. long; capsule oval, obtuse, 1.7 mm. long, 1.4 mm. 

 wide; seed ellipsoid, pubescent, 1.6 mm. long; aril 1 mm. long, the two lobes 

 oblong. 



Type in the U. S. National Herbarium, no. 1,011,733, collected in damp 

 places at an altitude of 950 meters, Quebrada de la Mojonera, San Ignacio, 

 Sinaloa, Mexico, February 19, 1919, by A. E. Salazar (no. 782). 



39— Pboc. Biol. Soc. Wash., Vol. 32, 1919. (189) 



