74 Contributions from the Gray Herbarium 



suboblique rotundatae basi e1 apice sparsissime puberulae 5 mm. 

 longae 2.3 mm. latae. Carina 5 mm. longa subdense incurvo-pu- 

 berula (unguiculo excepto), rostro cylindrico obtuso adscendente 

 O.s nun. longo. Petals superiora obovata ad apicem paullum dila- 

 tata apice oblique rotundata vix retusa 3.8 mm. Longa. Capsula 

 Bubmatura ovalis basi cuneata apice vix emarginulata incurvo- 

 puberula 3.6 nun. longa 2 mm. lata. Semen (immaturum) breviter 

 Bericeum 2.8 nun. longum. Arillus (submaturus) 1.0 mm. altus 

 glaber, umbone ad 0.3|flki. alto, lobis 2 lateralibus ad 1.3 mm. 

 Longis supra albidis cor [infra medium subscariosis. Sonora: 

 Babocomori, Sept, 1851, Tnurber 1090 (type: G). T. 2. Fig. 51. 



93.1. P. texensis Rob. Suffruticulose, the stems several from 

 a thick simple or branched woody root, erect or ascending, green, 

 sparsely or subdensely puberulous with strongly incurved hairs, 

 1.2-2.8 dm. high. Lower leaves oval, mucronulate, rounded at 

 apex, cuneate at base, coriaceous, reticulate, sparsely puberulous 

 chiefly on midnerve beneath and margin with strongly incurved 

 hairs, 8.5-12 mm. long, 4.5-6 mm. wide; middle and upper similar 

 but narrowly lanceolate or lance-linear, acute or acuminate at each 

 end, slightly revolute, 1.4-2.1 cm. long, 1.6-4 mm. wide, on petioles 

 1 mm. or less long. Racemes normally 10-20-jointed, strongly zig- 

 zag, (1.8) 3.5-6 cm. long. Upper sepal ovate-oblong, acute, 3.2 mm. 

 long, the lower oblong, acute, 2.6 mm. long, all more or less cilio- 

 late and incurved-puberulous. Wings oblong, obtuse, sparsely in- 

 curved-puberulous along midline, 5-5.3 mm. long, 2 mm. wide. 

 Keel 5 mm. long, the blunt rostrum 1.4 mm. long. Upper petals 

 oblong, obliquely 1-dentate at end, 4.7 mm. long. Capsule (sub- 

 mature) oval, subdensely puberulous, 4.2 mm. long, 2.8 mm. wide. 

 Seed (immature) sericeous, 2.7 mm. long. Aril 1.7 mm. long, the 

 two lateral lobes linear, appressed. Rob.! in Gray, Syn. Fl. i. pt. 

 1. 451 (1897). Texas: 1846, Lindheimer III. 333 p.p. (GK); 

 1847-48, Lindheimer IV. 333 p.p. (K); rocky places, Upper 

 Guadaloupe, July 1845, Lindheimer 337 (type coll.: G); Co- 

 manche, 8 Aug. 1877, Reverchon 708 (G). 



94. P. lithophila, sp. nov. Caules plures e basi fruticulosa erecti 

 vel patentes ramosi foliosi incurvo-puberuli 7-15 cm. longi. Folia 

 media lanceolata vel oblonga acuta vel acuminata mucronata basi 

 cuneata ad acuminata coriacea subreticulata sparsissime vel dense 

 incurvo-puberula 2-11.5 mm. longa 0.6-4.5 mm. lata, in petiolis ad 



