OF ARTS AND SCIENCES. 323 



might be regarded as a distinct species, but is connected with L. lasio- 

 carpum by intermediate forms, such as those collected at Monterey 

 (38, 42), and 2-188 Berlandicr (L. ruderale, var. lasiocarpmn, 

 Engelm.). 



LEriDiUM Mknziesii, DC. At INIonterey (43) ; San Luis Potosi 

 (146 Schaffner). Also 14 Rourgeau, in herb. Gray, mostly. 



Cristatf.lla erosa, Nutt. At Lamar, on Copano Bay, Texas 

 (51). C. Jamf'sii, Terr. & Gray, may perhaps be distinguished by 

 smaller flowers and shorter pods (an inch long or less). The genus, 

 however, should be reduced to a section of Polanisia. 



PoLANisiA UNiGLANDULOSA, DC. At Solcdad, Coahuila (52) ; 

 also San Luis Potosi (192 Schaffner), and Guanajuato (Duges). 



Polanisia trachysperma, Torr. & Gray. At Laredo on the 

 Rio Grande (54), the typical form, with style 3 or 1 lines long and 

 seeds more or less roughened. Also in the mountains north of 

 Monclova, Coahuila (53), a common form with shorter styles (a line 

 or two long) and smoother seeds ; flowers white, becoming pink. 



Oligomeris glaucescens, Camb. At Saltillo (1149). 



Helianthemum Coulteri. Stems short (3 to 6 inches high), erect 

 from a branched and spreading woody caudex : leaves oblanceolate 

 (\ io \\ inches long by 2 to 6 lines broad), acutish, attenuate at base 

 to a very short petiole, rough above with a short stellate pubescence, 

 densely soft-tomentose beneath, conspicuously pinnate-veined : flowers 

 large (an inch broad), shortly pedicelled in rather close corymbs, 

 the acute sepals 3 or 4 lines long : capsule broadly triangular-ovate, 

 a little shorter than the calyx. — At Zimapan (743 Coulter) and in the 

 Morales Mountains, San Luis Potosi (COS Schaffner). It is referred 

 by Hemsley to H. arenicola, Chapm., which has narrower leaves, 

 softly pubescent on both sides and not evidently nerved, flowers on 

 longer pedicels and subumbellate, and capsule narrower. 



Heliantiiemum patens, Ilemsl. In the San Rafael INIountains 

 (605 Schaffner) ; 30 Parry & Palmer. 



Helianthemu.m glomkratum. Lag. In the San Miguelito IVfoun- 

 tains (137 Schaff*ner) ; 28 Parry & Palmer. 



Helianthemum argenteum, Hemsl. In the San ^Miguelito 

 Mountains (606 Schaffner) ; 29 Parry & Palmer. 



Lechea major, Michx. In the San Rafael Mountains (Schaffner). 



Lechea Skin:neri, Benth. In the San Rafael IMo'mtains 

 (604 Schaffner) : 31 Parry & Palmer. 



YiOLA FLAGELLiPORMTS, Ilcmsl, At Lerios, Coahuila (56), and 

 in the San Miguelito Mountains (182 Schaffner) j 1033 Parry & 



