102 Contributions from the Gray Herbarium 



on petioles 0.5 nun. long. Racemes densely flowered, 0.6-3 (axis 

 at length 3.8 cm.) long, 1-1.3 cm. thick in flower, 5.5-6 mm. in 

 fruit, on peduncles 2-3.5 cm. long; pedicels 0.5 mm. long; bracts 

 deciduous. Flowers rose-purplish, 7 mm. long. Upper sepal ob- 

 long-ova fce, rounded to apex, broadly pinkish-bordered, serrulate on 

 margin, 2.5 mm. long; lower lanceolate, subacuminate to the acute 

 apex, serrulate, 2 mm. long. Wings linear-oblong, somewhat undu- 

 late-convolute on margin, slightly tapering at apex to an obtuse 

 point or submucronulate, green-centered, pinkish-margined, not 

 clawed, 3 mm. long, 0.6 mm. wide. Keel 7 mm. long, united with 

 the staminal tube and upper petals into a trough 5 mm. long; crest 

 of about 8 pairs of lobes, the posterior triangular-lanceolate, the 2 

 anterior longer, lanceolate, variously 2-3-lobed or cleft. Upper 

 petals 6.7 mm. long, the free portion obovate-oval, erose at the 

 truncate apex. Capsule suborbicular-ovate, cordate at base, barely 

 stipitate, emarginate at apex, 2.4 mm long, 2 mm. wide. Seed 

 plump, pilose, 2.2 mm. long. Aril 1.1 mm. long, membranaceous- 

 cellular, erect. L. Sp. ii. 701 (1753); Chod. Monog. ii. 189. t. 

 22. f. 16-18 (1893); Rob. in Gray, Syn. Fl. i. pt. 1. 455 (1897). P. 

 microphylla A. W. Benn.! (sphalm.) in Hemsl. Diag. PL Nov. i. 2 

 (1878). P. microptera A. W. Benn. ! Journ. Bot. xvii. 143 (1879). 

 Vera Cruz : Jalapa, Galeotti 7096 (cotype coll. of P. microphylla 

 and P. microptera: K) ; savannas, Mirador, 1838, Linden 74 (co- 

 type coll. of P. microphylla and P. microptera: K); dry meadows, 

 Zacuapan, Aug. 1906, Purpus [2072 (BG). T. 2. Fig. 78. 

 Also in the United States. 



Sect. 2. Monninopsis Gray. Capsule 2-celled, the upper cell 

 dehiscent between the narrow or rather broad wings, its seed aril- 

 late; lower cell usually indehiscent, wingless, its seed generally 

 exarillate. Gray, PI. Wright, ii. 31 (1853). Polygala sect. Ortho- 

 polygala subsect. II. Chod. Monog. ii. 281 (1893). Type species 

 P. hemipterocarpa Gray. 



a. Wingless cell of capsule broadly rugose 125. P. pterocarya. 



a. Wingless cell not rugose, b. 



b. Flowers violet 131. P. microloncha. 



b. Flowers white (the veins often purplish), c. 

 c. Flowers 3.5-5 mm. long, d. 



d. Stems finely incurved-puberulous 129. P. Watsoni. 



d. Stems glabrous, e. 



e. Capsule exceeding wings 127. P. hemipterocarpa. 



e. Capsule shorter than wings 128. P. macroloncha. 



c. Flowers 1.5-3.5 mm. long,/. 



