72 Contributions from the Gray Herbarium 



l. ( .)-2.1 mm. deep, the small corneous umbo appressed, glabrous, 

 the 2 corneous-scarious lobes narrowly oblong-obovate, rounded at 

 apex, appressed, 1.8 mm. long. Brandeg.l Univ. Calif. Pub. Bot. 

 iv. 272 (1912). San Luis Potosi: Bagre, Minas de San Rafael, 

 May L911, Purpus 5168 (type coll.: BG). T. 2. Fig. 49. 

 Brandegee's description of the stem as 1 m. long is perhaps a mis- 

 print for 1 dm. 



91. P. eucosma, sp. nov. Fruticulosa sparse ramosa procumbens 

 2 dm. longa et ultra, caulibus viridibus foliosis minute incurvo-pu- 

 berulis. Folia ovalia obtusa mucronata basi cuneata coriacea dense 

 reticulata glaberrima 4-9 mm. longa 2-6.5 mm. lata brevissime 

 petiolata. Flores 4.5 mm. longi, ut videtur rosei. Racemi pauci 

 2-3-flori ad 7 mm. longi. Sepalum superius ovali-ovatum acutius- 

 culum subsparse ciliolatum ceterum glabrum 3 mm. longum; in- 

 feriora oblongo-ovalia aequilonga. Alae obliquae obovatae basi 

 cuneate apice obtusae minute retusae glabrae 4.5 mm. longae 2.3 

 mm. latae nervis liberis. Carina in medio saccata ad 4.3 mm. longa, 

 rostro obtuso descendente 0.7 mm. longo. Petala superiora oblonga 

 ad 3.8 mm. longa. Fructus deest. Coahuila: Sierra Madre, 64 

 km. south of Saltillo, Mar. 1880, Palmer 2143 (type coll.: GK). 

 Distributed and recorded by Watson (Proc. Am. Acad. xvii. 324 

 (1882)) as P. Lindheimeri Gray. 



91. 1. P. Emoryi, sp. nov. Fruticulosa ramosa 1.8 dm. longa et 

 ultra basi invisa. Caulis tenuis dense puberulus pilis incurvato- 

 patentibus. Folia ovalia obtusa valde mucronulata basi rotundata 

 coriacea reticulata (nervis lateralibus 2-3-jugis) subsparse puberula 

 pilis incurvo-patentibus 6-16 mm. longa 5-11 mm. lata, in petiolis 

 similiter puberulis 1-1.5 mm. longis. Racemi extra-axillares 2-6- 

 flori 1.7-2.7 cm. longi. Sepalum superius ovatum acutum 2.8 mm. 

 longum, inferiora oblonga acuta 2 mm. longa; omnia sparse pu- 

 berula et sparsissime ciliata pilis incurvo-patentibus. Alae oblongae 

 carinam subaequantia vix bene visae. Carina 4.2 mm. longa, rostro 

 cylindrico 1.1 mm. longo. Fructus deest. Texas (?): valley of 

 the Rio Grande, Mexican Boundary Survey under Emory 190 p. p. 

 (type : K). Apparently distinct from P. Lindheimeri in leaf form 

 and pubescence, but possibly grading into that species; the Kew 

 material is mixed with it. 



92. P. Lindheimeri Gray. Stems several from a fruticulose 

 base, erectish to decumbent, green, densely pilose with rather short 



