28 FLORA OF ST. CROIX AND THE VIRGIN ISLANDS. 



49. P. pilosa, L. 



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

 Petals red or yellow, large. Corolla up to 10'" diain., open only till 9 

 a. m. Seeds darlc brown. Leaves adpressing themselves downward to 

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

 grass-llelds. — St. Croix; St. Thomas. 



50. P. halimoides, L. 



ri. Juno-Dec. Common along roadsides and among rocks. — St. 

 Croix; St. Thomas. 



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



Fl. all the year round. Sejials 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 roelcy shores. — St. Croix ; St. Thomas. 



OTALVACE^. 



53. Rlalvastrum spicatum, Gris. (v. IToUow-stock). 



y\. all the year round. Flower exi)anding in the afternoon. Very 

 variable. A common Aveed along roads and in lields. — All i.slands. 



54. M. tricuspidatum, Asa Gray. 



Fl. all the year round. Common along roads and tlitches. — All isl- 

 r.iids. 



55. Sida carpinifolia, L. c) aud /3) brevicuspidata. 



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

 Petals imbricate dextrorsely or siuistrorsely. Both forms very conuuon 

 weeds everywhere in dry localities. — All islands. 



5G. S. glomerata, Cav. 



I'l. Aug.-Oct. — But']c Island near St. Thomas; Vieciues. 



57. S. cilinri3, L. 



Fl. Sept.-March. Flower exi)an(k(l till 10 A. 31. Stipules always 

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

 evening. Gregai'ious on roads and near <litehes. Conuuon. — .Ml islands. 



