124: PROCEEDINGS OF THE AMERICAN ACADEMY 



EvoLVULtrs ALsmoTDES, Linn. At Monclova, Coahuila (915), 

 at Monterey, Nuevo Leon (2096), at San Luis Potosi (615 SchafF- 

 ner), and at Guanajuato (Duges) ; 628 Parry & Palmer. 



DiCHONDRA REPENS, Forst. At Guanajuato (Duges). 



DiCHONDRA ARGENTEA, Humb. & Bonpl. About San Luis Potosi 

 (617 Schaffner), and at Guanajuato (Duges) ; 624 Parry & Palmer. 

 The popular name is " Oreja de raton." 



Cress A Cretica, Linn. At San Lorenzo de Laguna, Coahuila. 



CuscuTA UMBELLATA, HBK. At Laredo on the Rio Grande 

 (916). 



CuscuTA SQUAMATA, Eogelm. At San Lorenzo de Laguna, Coa-. 

 huila (917, 2098). 



CuscuTA ARVENSis, Beyr. At Parras, Coahuila (919). Also var. 

 VERRUCOSA, Engelm., at San Luis Potosi (780 Schaifner). 



CuscuTA PoTOSiNA, Schaffner Ms. Stems capillary : the flowers 

 minute (scarcely a line long), short-pedicelled in small rather loose 

 clusters : calyx-lobes triangular, acute, scarcely equalling the deeply 

 campanulate corolla-tube, which is rather longer than its erect ovate 

 acute somewhat inflexed and at last connivent lobes : stamens short, 

 the subglobose anthers nearly as long as the filaments ; scales broad, 

 deeply fringed, slightly exceeding the tube : capillary styles nearly as 

 long as the depressed ovary : capsule covered by the marceseent 

 corolla, extremely thin, easily tearing off from its base but not cir- 

 cumscissile, 1-seeded. — One of the smallest-flowered sjjecies, closely 

 allied to C. arvensis, from which the very fragile 1-seeded capsule, 

 covered by the hood-like corolla, principally distinguishes it. (^Dr. G. 

 Engelmann.) — Near San Luis Potosi (779 Schaffner); growing on 

 some labiate, probably a Scutellaria.* 



CuscuTA DECORA, Chois. At Bluffton, Texas (2097). 



* Dr. Engelmann furnishes the following description of another new species, 

 which was distributed in the previous Parry «& Pahner collection : — 



C. MiTR^FOBMis, Engelm. Stems thick : flowers short-pedicelled, crowded 

 in large glomerules ; calyx-lobes orbicular, unequal, the outer carinate, fully as 

 long as the short-campanulate corolla-tube ; lobes of the corolla as long as the 

 tube, broadly oval, rounded, at last spreading or reflexed . subulate filaments 

 as long as the hnear-oblong anthers ; scales very broad, deeply fringed, exsert, 

 incurved : ovary with very short subulate styles : capsule large, exsert, 2-horned 

 with the broad spreadnig conical styles, regularly circumscissile. — Between 

 San Luis Potosi and Tampico, in May ; Dr. E. Palmer. Flowers 3 lines and 

 capsule 4 lines long; clusters in fruit 10 to 12 lines thick. Nearly allied to C. 

 Xalapensis, but distinguished by its much larger flowers and fruit, and by its 

 short thick almost conical styles. 



