28 FLORA OF ST. CROIX AND THE VIRGIN ISLANDS, 



4-9. P. pilosa, L. 



Fl. all llic year rouud. Often nearly glabrous. Boots tuberous. 

 Petals red or yellow, large. Corolla up to IG'" diain., open only till 9 

 a. m. Seeds dark browu. Leaves adpressing themselves downward to 

 the stem towards evening. Not uncommon. Along ditches and iu 

 grass-fields. — St. Croix j St. Thomas. 



50. P. halimoides, L. 



Fl. June-Dec. Common along roadsides and among rocks. — St. 

 Croix; St. Thomas. 



51. Sesuvium portulacastrum, L. (v. Bay-flower). 



Fl. all the year round. Sepals rosy inside. Common on sandy 

 shores. — All islands. 



52. Trianthezna moncgynum, L. 



Fl. all the year round. Branches always originating in the axil of 

 the smaller leaf. Stamens 7-17. Sepals and stamens rosy or white. 

 Common on rocky shores. — St. Croix ; St. Thomas. 



MAI.VACE7E. 



53. Malvastrum spicatum, Gris. (v. Ilollow-stock). 



Fl. all the year rouud. Flower expanding in the afternoon. Very 

 variable. A common weed along roads and in fields. — All islands. 



54. M. tricuspidatum, Asa Gray. 



Fl. all the year round. Common along roads and ditches. — ^AU isl- 

 ands. 



55. Sida carpinifolia, L. a) and /3) brevicuspidata. 



Fl. Sept.-March. Pedicel geniculate at the base, or as often not so. 

 Petals imbricate dextrorsely or sinistrorsely. Both forms very common 

 Meeds everywhere iu dry localities. — ^AU islands. 



56. S. glomerata, Cav. 



Fl. Aug.-Oct. — Buck Island near St. Thomas ; Vieques. 



57. S. ciliaris, L. 



Fl. Sept.-March. Flower expanded till 10 A. M. Stipules always 

 longer than the petioles. Leaves closely clasping the stem in the 

 evening. Gregarious on roads and near ditches. Common. — ^AU islands. 



