222 STATE HORTICULTURAL SOCIETY 



2880. T. erytlirospermum, Andrz: Red-seeded Dandelion. 

 Introduced from Europe, infrequent. 



SONCHUS, L. 



2881. 8. oleraceus, L. Annual Sow-thistle. 

 Waste places ; introduced from Europe. 



2882. 8. asper, (L.) All. Spiny Sow-thistle. 

 A common introduced weed. 



LACTUCA, L. 



2883. L. scariola, L. Prickly Lettuce. 



An introduced weed, spreading rapidly. 



2884. L. ludoviciana, (Nutt.) DC. Western Lettuce. 

 Rich soil; infrequent. 



2885. L. canadensis, L. Wild Lettuce. 

 On moist prairies. 



2886. L. hirsuta, Muhl. Hairy Wood-lettuce. 

 In dry soil. 



2887. L. sagittifolia, Ell. -Arrow-leaved Lettuce. 

 In moist soil. 



2888. L. pulchella, (Pursh.) DC. Large-flowered Blue Let- 



tuce. 

 In moist soil. 



2889. L. villosa, Jacq. Hairy-veined Blue Lettuce. 

 In thickets, southward. 



2890. L. floridana, (L.) Gaertn. Florida Lettuce. 

 Borders of woods. Frequent. 



2891. L. spicata, (Lam.) Hitchc. Tall Blue Lettuce. 

 Rich soil, borders of woods. 



LYGODESMIA, D. Don. 



2892. L. juncea, (Pursh.) D. Don. Rush-like Lygodesmia. 

 Prairies; infrequent. 



NOTHOCALAIS, Greene. 



2893. N. cuspidata, (Pursh.) Greene. False Calais. 

 Dry soil ; prairies. 



HIERACIUM, L. 



2894. H. canadense, Michx. Canada Hawkweed. 

 Common in drv woods. 



