188 STATE HORTICULTUEAL SOCIETY 



2428. P. verticillata, L. Whorled Milkwort. 

 In dry open places ; not common. 



2429. P. ambigua, Nutt. Loose-spiked Milkwort. 

 Dry soil, infrequent. 



2430. P. incarnata, L. Pink Milkwort. 

 In dry soil, scarce. 



2431. P. viridescens, L. Field Milkwort. 



Rather common, on prairies and in meadows. 



2432. P. nuttallii, T. & G. Nuttall's Milkwort. 

 Infrequent. 



2433. P. senega, L. Senca Snakeroot. 

 On rocky slopes. Not common. 



EUPHOBIACE.E. SPUBGE FAMILY. 



Croton, L. 



2434. C. glandulosus, L. Glandular Croton. 

 Common in sandy soil. 



2435. C. capitatus, Michx. Hogwort. 

 Dry soil, infrequent. 



2436. C. texensis, (Klotzsch) Muell. Arg. Texas Croton. 

 Dry soil, infrequent. 



ACALYPHA, L. 



2437. A. virginica, L. Virginia Three-seeded Mercury. 

 Woods and thickets; common. 



2438. A. gracilens, A. Gray. Slender Three-seeded Mercury. 

 Sandy soil, frequent. 



Euphorbia, L. 



2439. E. geyeri, Engelm. & Gray. Geyer's Spurge. 

 Common in sandy soil. 



2440. E. serpens, H. B. K. Round-leaved Spreading Spurge. 

 Not common. 



2441. E. serpyllifolia, Pers. Thyme-leaved Spurge. 

 Not common. 



2442. E. glyptosperma, Engelm. Eidge-seeded Spurge. 

 Not infrequent. 



2443. E. maculata, L. Milk Purslane. 

 A common weed. 



