72 Contributions from the Gray Herbarium 
1.9-2.1 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.! Univ. Calif. Pub. Bot. 
iv. 272 (1912). — San Luis Porosi: Bagre, Minas de San Rafael, 
May 1911, Purpus 5168 (Type cotu.: BG).—T. 2. Fic. 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. — Coanurua: Sierra Madre, 64 
km. south of Saltillo, Mar. 1880, Palmer 2143 (rypE couu.: 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 —— acuta 2 mm. longa; omnia sparse pu- 
berula et o-patentibus. Alae oblongae 
carinam subaequantia vix bene visae. ain 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- 
(rype: 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. LinpHEermeri Gray. Stems several from a fruticulose 
base, erectish to decumbent, green, densely pilose with rather short 
