NOTES ON MOUND FLORA OF ATCHISON CO., MO. 131 
Carpuus UNDULATUS Nutt. 
On several mounds about half way up their sides. 
C. altissimus L. (Watson No. 433), and C. lanceolatus L. 
(Watson No. 434), were common on the bottom prairie 
below. (Watson No. 429.) 
LyGopEsMIA JUNCEA (Pursh) Don. 
Abundant all over the mounds, wherever the ground is 
bare and free of shrubs. (Watson No. 428.) 
LAcTUCA PULCHELLA (Pursh) D. C. 
Common near the bases of nearly all the mounds. 
Flowers a month earlier than any of our other Lactucas. 
(Watson No. 427.) 
Lactuca Lupovicrana (Nutt.) D. C. 
Common with the last species. Several other species, as 
L. scariola L. (Watson No. 424), L. Canadensis L. 
(Watson No. 425), and L. sagittaefolia Ell. (Watson 
No. 423), were common near the mounds on the bottom- 
prairie. (Watson No. 426.) 
ASCLEPIAS VERTICILLATA L. 
Abundant on all the bare parts of the mounds. A. Sul- 
livantii Engelm. (Watson No. 436), and A. Syriaca L. 
(Watson No. 437), were common on the bottom-prairie 
near the mounds. (Watson No. 435.) 
ACERATES VIRIDIFLORA Ives Britton. 
Common on all the mounds in bare ground. (Watson 
No. 438.) 
ACERATES VIRIDIFLORA LINEARIS A. Gray. 
Not uncommon with the last. The specific form was 
not observed in the county. (Watson No. 439.) 
Lapruta Lapruta (L.) Karst. 
Common on nearly all the mounds, but most likely intro- 
