OP ARTS AND SCIENCES. 329 



Drymauia poltcarpoides, Gray. At the same locality (73, 

 in part). Glaucous throughout : cymes terminal : seeds white and 

 shining, almost transparent. Very distinct from the next. 

 . Drymaria crassifolia, Benth. With similar glaucous foliage, 

 but the internodes elongated and the slender pedicels fascicled in the 

 axils : seeds nearly orbicular, dark brown, opaque. — Mixed with the 

 last under the same number, in the Gray Herbarium set. 



Drymaria nodosa, Engelm., and var. angustifolia, Hemsl. 

 Near San Miguelito (1 40 SchafFner) ; 60 Parry & Palmer. 



Drymaria arenarioides, Willd. (D. frankemoides, HBK.) 

 Near Morales (131) Schaflfner) ; 49 Parry & Palmer. 



Drymaria xerophylla, Gray. Near Morales (131 Schaffner) ; 

 50 Parry & Palmer. 



Cerdia purpurascens, DC. San Luis Potosi (128 SchafFner). 



Cerdia glauca, Hemsl. In the Esculerillos Mountains (Schaff- 

 oer) ; 63 Parry & Palmer. 



Cerdia gongestiflora, Hemsl. In mountains near San Luis 

 Potosi (Schaffner); 63|^ Parry & Palmer. 



Achyronychia Parryi, Hemsl. At Lerios, Coahuila, a single 

 specimen ; 53 Parry & Palmer. 



PoRTULACA PiLOSA, Linn. At Laredo, on the Rio Grande (2141), 

 and about San Luis Potosi (771 Schaffner) ; 66 Parry & Palmer. 

 Also a peculiar form, probably distinct, with a thick fleshy root, 

 small narrow leaves, 1 to 3 lines long, and very hairy in the axils, 

 smaller flowers, and lighter-colored seeds ; in the San Miguelito 

 Mountains (772 Schaffner). 



Talinopsis frutescens. Gray. In San Luis Potosi Valley 

 (773 Schaffner) ; 67 Parry & Palmer. 



Talinum aurantiacum, Engelm. At Laredo, on the Rio Grande 

 (2142), and San Luis Potosi (770 Schaffner) ; 68 Parry & Palmer. 



Fouquieria splendens, Engelm. In the mountains east of 

 Saltillo (80), and at San Lorenzo de Laguna, Coahuila. 



Elatine Americana, Nutt. Near Morales (122 Schaffner). 



Hypericum perforatum, Linn. At Sutherland Springs, "Wilson 

 Co., Texas (81). 



Hypericum mutilum, Linn., var. (?) Leaves rounded to ovate- 

 cordate, clasping ; floral bracts narrowly linear : sepals very unequal, 

 spatulate to oblong-oblanceolate, obtuse or acutish, H to 2^ lines long, 

 exceeding the ovate capsule : seeds acutish at each end, light-brown. 

 — On Caracol Mountains, Coahuila (82). II. philonotis, Schlecht., is 

 probably H. mutilum. 



