OF ARTS AND SCIENCES. 327 



Cerastium nutans, Raf. At Lerios, Coahuila ; near San Luis 

 Potosi (143 Schaffher) ; 47 Parry & Palmer. 



Stfxlaria cuspidata, "Willd. At Morales (124 SchafFner). The 

 identification of this species with the European ^S*. nemorum, Linn., 

 is at least doubtful. It appears to have a more herbaceous and much 

 more pubescent calyx, the leaves broadest nearer the base, and the 

 seeds smaller and more coarsely tuberculate. 



Stellaria ruosTRATA, IJuldw. At Guajuco, Nuevo Leon (77). 

 Distinguished from the last by its annual root, more or less broadly 

 ovate acute and usually smaller leaves, smaller and more glabrous 

 calyx, and smaller seeds scarcely roughened on the sides. 



Arenaria alsinoides, Willd. {A. diffusa, Ell. A. lanuginosa, 

 Eohrb.) lu the Sierra Madre, south of Saltillo (7G), and near Sau 

 Luis Potosi (135 SchafFner); 48 and bb}j Parry & Palmer. Also 

 var. angustifolia, with leaves very narrowly linear (^ to 1 line 

 wide), sometimes with broader ones at the lower nodes. A low form 

 of this variety, with mostly simple 1- few-flowered stems and short pun- 

 gent leaves, was collected at Saltillo. The species is very variable in 

 its southwestern range, sometimes developing a diffuse regular dicho- 

 tomously branched inflorescence. 



Arenaria decussata, HBK. At Lerios, Coahuila (75), and in 

 wet shady places near Morales (138 Schaffner) ; Gl Parry & Palmer, 



Lepigonum* Mexicanum, Hemsl. (under the «ame Spergularia) . 

 In sandy places near San Luis Potosi (137 Schaffner); 52 Parry & 

 Palmer. " Flowers pale yellow." Decidedly perennial, with a thick 

 perpendicular root. The various forms in Schaffner's collection show 

 that 58 Parry & Palmer (" S. neglecta?") is a stunted state of it. 



Lepigonum rubrum, Fries. San Luis Potosi (137'' Schaffner). 



Drymaria cordata, Willd. At Saltillo (79). Young speci- 

 mens of what appears to be this species, distinguished by the rounded 

 leaves, subtruncate at base, rarely at all apiculate at the rounded 

 summit, the inflorescence lax and few-flowered, and the sepals ordi- 

 narily quite glabrous, 1 to 1^ lines long, acute and scarcely nerved. 

 The stems are lax, from an annual root, at length rooting at the 

 lower nodes. 



* Tliis generic name is retained for the reasons that are given by Kindbcrg 

 in his monograph of the genus. Stipularia, Haworth (1812), would strictly 

 have precedence, but was long overlooked (even by Bentham & Hooker), and 

 the name has been adopted for a Rubiaceous genus. Lepigonum was proposed 

 by Fries in 1817. Speigularia was first taken up as a generic name by Presl in 

 1819. 



