28 FLORA OF ST. CROIX AND THE VIRGIN ISLANDS. 



49. P. pilosa, L. 



Fl. all the year round. Often nearly glabrous. Eoots tuberous. 

 Petals red or yellow, large. Corolla up to W diain., open only till 9 

 a. in. Seeds dark brown. Leaves adpressing themselves downward to 

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

 grass-fields. St. Croix ; 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. Trianthema monogynum, 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. 



MALVACEAE. 



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



Fl. all the year round. 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. All isl- 

 ands. 



55. Sida carpinifolia, L. c) 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 

 weeds everywhere in dry localities. All islands. 



56. S. glomerata, Cav. 



Fl. Aug.-Oct. Buck Island near St. Thomas j 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. All islands. 



