138 ONAGRACEAE 



1. P. petiolata ( L. ) Knsby. Tar Weed. A viscid-pubescent annual, 

 6^-18^ hi{j;h : leaves ovate-lanceolate, petioled, entire : petals purple. — 

 Often very abundant on dry hills. July-September. 



Family 90. ONAGRACEAE Dumort. 

 Herbs with rejiular perfect flowers, the parts in twos, fours or more. 

 Calyx tube adnate to and sometimes prolonged beyond the ovary. Sta- 

 mens and petals (when present) inserted on the summit of the calyx 

 tube. Ovary 1-4-celled. Stigma capitate or four-lobed. Ovules 

 numerous. 



1. L. palustiis (L. ) Ell. Marsh Purslane. Creeping or floating: 

 leaves ovate, petioled : petals minute or none : flowers nearly sessile : 

 capsule 4-sided. — Ponds and low grounds in the vicinity of Lake City. 

 Infrequent. July-September. 



2. L. polycarpa Short & Peter. l°-22° high : leaves linear-lanceolate, 

 those of the runners spatulate : flowers sessile : capsule top-shaped, bracted 

 at base. — Low grounds near Lake City and Sibley. Local. Julj'-Sep- 

 tember. 



3. L. alternlfolia L. l°-3° high : leaves lanceolate : flowers short- 

 peduncled : cjipsules cubical, wing-angled. — Frequent in moist places 

 throughout. June-September. 



2. JUSSIAEA L. 

 Calyx tube elongated. Capsule long-linear. 



1. J. diffusa Forskl. Creeping : leaves oval-oblong, entire, petioled : 

 petals yellow, live : sepals live : capsules long-peduncled, linear, terete. 



