34 Contributions from the (iray Herbarium 



rascentee 6 6.5 mm. longae 4-4.8 nun. latae. ( larina alas aequans. 

 Petala superiora apice parum dilatata 6 nun. longa. Capsula ellip- 

 tica immaturitate sparse incurvo-pubescens maturitate glabra 

 margine ciliato excepto) 6.5 7 nun. longa 5 5.5 mm. lata. Semen 

 subsericeo-pilosum 1.5 mm. Ionium. Arillus 1.0 nun. altus, in 

 margine dorsali 2 nun. longus, umbone0.5 mm. alto, margine scari- 

 ad 1.1 mm. alto irregulariter lobulato in lobos non diviso. 

 Puebla: Tlacuilotepec, June 1909, Purpus 3921 (type coll.: BG). 

 Distributed as P. obscura Benth. T. 1. Fig. 22. 



37. P. Brandegeeana Chod. Many-stemmed from a thick 

 woody base, the stems branched, erectish, 7-9 cm. high, pubescent 

 with incurved-ascending hairs. Leaves below much reduced, obo- 

 vate, 2.5 3 mm. long, 1-1.5 mm. wide; middle and upper oblong to 

 oval or oblong-linear, acute to obtuse, scarcely mucronulate, cune- 

 ate-rounded at base, thickish, subglabrous but lepidote above, 

 sparsely incurved-pubescent beneath, 6-10 mm. long, 1.5-4.5 mm. 

 wide, on petioles about 0.5 mm. long. Racemes very short, pseudo- 

 la tend, 1-3-flowered; bracts subulate, rather persistent. Flowers 

 greenish, 4-4.5 mm. long. Sepals lanceolate to ovate-lanceolate, 

 acuminate, sparsely incurved-pubescent to subglabrate, 2.3-2.7 

 mm. long, the upper subpersistent. Wings oval, rounded at apex, 

 unguiculate at base, ciliolate above, sparsely incurved-pubescent 

 along costa, 4.5 mm. long, 2.5-2.8 mm. wide. Carina glabrous, 

 greenish, 4 mm. long. Upper petals purplish toward apex, 3.5 mm. 

 long. Capsule elliptic, emarginate, at submaturity with a few 

 hairs on side, at maturity glabrous except for the ciliate margin, 

 7.5-8.5 mm. long, 6-6.5 mm. wide. Seed silky-pilose, 4 mm. long. 

 Aril 1.5 mm. deep, 2.3 mm. long on back; umbo 0.6 mm. deep; 

 scarious margin irregularly lobulate, with indistinct lateral and dis- 

 tinct dorsal lobe descending at an angle of about 45. Chod.! 

 Bot. Jahrb. Hi. Beibl. 115. 72 (1914), as P. Brandegeeanum. 

 Puebla: dry places, El Riego, Tehuacan, July 1905, Purpus 1429 

 (type coll.: BG). Hidalgo: Zimapan, Coulter 728 p.p. (K), 

 729 p. p. (K). T. 1. Fig. 23. 



38. P. compacta Rose. Suffruticulose, many-stemmed, the 

 stems subsimple or branched, ascending, 9-21 cm. high, usually 

 densely leafy, like the inflorescence griseous-puberulous with in- 

 curved hairs. Lower leaves obovate to oval or oval-oblong, ob- 

 tuse, mucronulate, cuneate at base, 1-nerved, the lateral nerves 



