20 Contributions from the Gray Herbarium 



Nov. Gen. v. 407 1 182] I. P. ovalifolia DC. Prod. i. 331 (1824). 

 San l.i i> Potosi: San Rafael Mi-.. Aug. L877, Schaffner 7 p.p. 

 GK : without definite locality, Schaffner 49jyp. p. (B); alt! L830 

 2440 m., L878, Parry & Palmer 43 p. p. (BK). -T. 1. Fig. 7. 



ic. p. myrtill* udes Willd. Fraticulose al base, many-stemmed, 

 the Btems erectish, branched, up to L.8 dm. high, like the branches, 

 raceme-axes, and pedicels densely puberulous with subappressed 

 hairs. Leaves elliptic to oblong-oval or oval-ovate, the uppermost 

 sometimes oblong, retuse, obtuse, or acutish at apex, cuneate to 

 rounded at base, Bubcoriaceous, reticulate below, subdensely pu- 

 bescenl on both faces with short subappressed hairs, the larger 

 L.5 2 cm. long, 6-12 mm. wide. Racemes loosely flowered, 2 cm. 

 long. Mowers 4-8. Sepals ovate-lanceolate to linear-lanceolate, 

 acuminate, sparsely incurved-puberulous, 4 mm. long. Wings 

 obovate-oval, obtuse or rounded at apex, incurved-puberulous, 

 5.5-6.5 mm. long, 2.8-3.5 mm. wide, both sepals and wings sub- 

 persistent. Keel greenish, 4.5 mm. long. Capsule elliptic, sub- 

 densely incurved-puberulous and ciliolate, 6.5-7 mm. long, 6 mm. 

 wide. Seed 4 mm. long, shortly pilose. Aril broadly scarious-mar- 

 gined, three-lobed, the lateral lobes oblong, oblique, somewhat 

 dilated at apex, the dorsal short, horizontal. Sp. PL hi. 889 

 (1803); Chod. Monog. ii. 18 (1893), pro parte. San Luis Po- 

 tosi: San Rafael Mts., Aug. 1877, Schaffner 7 p. p. (K); without 

 locality, Schaffner 495 p.p. (B); 1830-2440 m., 1878, Parry & 

 Palmer 43 p. p. (GK). Hidalgo: Sierra de Pachuca, alt. 2745 

 m., 22 July 1898, Pringle 7654 (G). T. 1. Fig. 8. Chodat's 

 figures (t. 13. f. 23-24) surely are not of the species as here taken. 



17. P. Robinsonii, nom. nov. Perennial, scarcely suffrutescent, 

 with 1-3 slender stems 3-7 cm. high, simple or subsimple, ap- 

 pressed-puberulous like the raceme-axes and pedicels. Leaves few, 

 elliptic or the upper oval-oblong, rounded to obtuse at the slightly 

 mucronulate apex, cuneate to rounded at base, rather thin, with 

 1-2 pairs of lateral nerves, not reticulate, purplish on under side, 

 densely appressed-puberulous both sides, the larger 1.3-2.3 cm. 

 long, 8-16 mm. wide. Racemes few-flowered, 1.3-2.3 cm. long. 

 Sepals lanceolate, subpetaloid, magenta-tinted, incurved-pilosu- 

 lous, shorter than wings, soon deciduous. Alae oblong, obtuse, 

 sparsely incurved-pilosulous, magenta-color, 3.8 mm. long. Keel 

 yellowish, 3 mm. long. Capsule orbicular, purpurascent, incurved- 



