24 Contributions from the Gray Herbarium 



The species, if really Mexican, may perhaps belong in the Ovati- 

 foliae but is placed in this series on accounl of Chodat's descrip- 

 tion of the leaves as " irregularis el diversa." 



21. 1'. Conzatti] Rose. Slender, up to 1 dm. bigh or more, 



clothed with slimi crisp hairs. Leaves shortly oblong, obtuse, oar- 

 rowed into a distinct petiole, sparsely pubescent , 2 cm. long or less. 



Raceme elongate, slender; bracts ovate, puberulenl on hack, per- 

 sistent ; pedicels 3-4 mm. Long. Flowers pinkish. Sepals glabrous, 

 the upper one persistent. Fruit orbicular, or sometimes broader 

 than long, ret use, at first densely pubescent, soon glabrate, 3-4 mm. 

 broad. Rose, Contr. U. S. Nat. Herb. xiii. 307 (1911). " Type 

 . . . collected by C. Conzatti on Cerro San Antonio, Oaxaca, Mexi- 

 co, October 28, 1908 (no. 1587)." Not seen; description com- 

 piled. The place of this species in the section cannot satisfactorily 

 be made out from its description. 



22. P. magdalenae Brandegee. Stems " prostrate," sparsely 

 branched, 1-3 dm. long, like the inflorescence griseous-puberulous 

 with incurved hairs. Lowest leaves oval-oblong, obtuse, short- 

 petioled, rather densely puberulous with incurved hairs, 7 mm. long, 

 4 mm. wide; middle and upper oblong or oblong-ovate to linear, 

 acutish, mucronulate, cuneate or acute at base, with 1-3 pairs of 

 lateral nerves, not reticulate, rather densely puberulous with in- 

 curved hairs, 1.2-2 cm. long, 2-8 mm. wide, on petioles 1 mm. long. 

 Racemes loosely flowered, 4-10.5 cm. long. Flowers ochroleucous. 

 Sepals lanceolate, acute, pilosulous with somewhat incurved hairs, 



2 mm. long. Wings narrowly obovate-oval, obtuse, puberulous 

 above, 4.5 mm. long, 2.8 mm. wide. Keel 3.5-4 mm. long. Upper 

 petals obliquely oblong, nearly glabrous, apparency violet-tinged, 



3 mm. long. Capsule elliptic, withj^arly closed apical sinus, more 

 or less densely appressed-puberuloTS, 7.5-9.5 mm. long, 6-7 mm. 

 wide. Seed wedge-obovoid, pilose, 4 mm. long. Aril minute, 0.7 

 mm. *i&>ng, with pubescent umbo and very narrow barely crenate 

 scariofc margin. Brandeg. Univ. Calif. Pub. Bot. iv. 182 (1911). 

 Lower California: sunny hills, San Jose del Cabo, Jan.-Mar. 

 1901, Purpus 391 (K). 



23. P. leptosperma Chod. Stem suffrutescent at base, sparsely 

 branched, 12 cm. long, hirsute-tomentose above. Leaves lanceo- 

 late to lance-linear, acute, subtomentose-velutinous, 1.5-2.2 cm. 

 long, 7-9 mm. wide. Racemes terminal, rather loosely flowered. 



