16 NEOBOT. 



Riddell who sent it to me from New Orleans as 

 an unknown G. with several other rare plants, 

 he is the author of a Western Flora and disco- 

 verer of many new plants there. If his name 

 has been employed already, we "may substitute 



AWTII'IIYLA SERRATA Raf. 



757. RIDDELIA ANTIPHYLA Raf. Leaves 

 smooth lanceolate acute, equaly serrate, petiols 

 short pubescent, stipules subulate ; peduncles 

 extraxilary unifl. equal to petiols, sepals colored 

 linear lanceolate acuminate pubescent, petals 

 subequal cuneate obtuse, pod divergent strait 

 equal to leaves apparently a virgate shrub, 

 branches fuscate terete rimose, leaves and pods 

 uncial, almost opposite to each other, flowers 

 yellow small, stamens 5 or 6, shorter than flow- 

 ers. Pods fuscate smooth, seeds black com- 

 pressed squared truncate. 



758. SESUVIUM VERUUCOSUM Raf. prostrate 

 roughened by warts, leaves thick petiolate obo- 

 vate and cuneate obtuse entire, flowers axillary 

 subsessile commonly solitary a very distinct 

 sp. with the habit of Portulaca oleracea, but en- 

 entirely covered with rough tubercules and 

 warts, when dry of a fulvous glaucous color all 

 over, many branches, leaves small, flowers 1 to 

 3 in the axils, campanulate, white inside, sta- 

 mens many, and thus totaly unlike the S. pen- 

 tandrum of Elliot which is my G. Squibbia 

 maritima. This sp. was sent me from Arkan- 

 zas and the Chacta Conntry, where it grows 

 near streams on the Yazou and Salt River. 



759. SPERGULA *\ALCATA Raf. Diffuse de- 

 cumbent smooth glaucous, leaves linear falcate 

 acute, base connate, peduncles axillary equal to 

 internodes and leaves, erect, segments of calix 

 ovate obtuse equal to petals and capsule. On 



