Seed Plants, Ferns, Fern Allies of the Austin Region 31 



PAPAVEVRALES 

 PAPAVERACEAE Poppy Family 



Argemone alba Lesteb. Wild Poppy. 



Open dry ground, with large white flowers and prickly leaves and 

 stems. 



Southeastern states. 



Argemone Platyceras Link & Otto. Wild Poppy. 

 Open dry ground. Similar to the preceding. 

 Southwestern states and Mexico. 



Papaver dubium L. Poppy. , 



Growing wild abundantly on the campus. The familiar red poppy. 

 Introduced from Europe and growing wild in the eastern states 



FUMARIACEAE Fumitory Family (Under Papaveraceae) 



Capnoides curvisiliquum Kuntze. (Corydalis curvisiliqua Engelm.) 

 Very common in open woods and valleys. Blooming early with 



bright yellow, irregular flowers in elongated clusters. 

 Kansas to Texas. 



BRASSICACEAE (CRUCIFERAE) Mustard Family 



Arabis petiolaris A. Gray. 



Common in open woods and uplands of the Edwards Plateau. 

 Plains and prairies of southwestern Texas. 



Arabis virginica Trelease. (A. ludoviciana Meyer.) Virginia Rock 

 Cress. 



Abundant in the early spring in wet places along roadsides and ir 

 shallow pools. 



Eastern and southern states. 



Brassica Juncea Cosson. Indian Mustard. 



Found in an alfalfa field and presumably introduced with the seed. 

 Naturalized from Asia. Widespread in the northeastern states. 



Bursa Bursa-pastoris Brit. (Capsella bursa-pastnris Moench.) Shep- 

 herd's Purse. 



Abundant in waste and cultivated ground, lawns and roadsides. 

 Well known by its triangular or heartshaped pods. 



Native of Europe, but widely distributed all over the world. One 

 of the commonest weeds in the world. 



