490 TRANS. ST. LOUIS ACAD. SCIENCE. 



Acer saccharum, Marsh., var. nigrum, (Michx. f. ) Britton, 

 Trans. X. Y. Acad. Sci. .ix 1SS9. — A. nigrum. Michx. f. Arb. Amer. 

 ii. iSio. — A. sacckarinum. Wang., var. nigrum, Torr. ^: Gray, Fl. i. 

 p. 24S. Upland woods; frequent. 



A. SACCHARINUM, L. Spec. — A. dasijcarpuni, Ehrh. Beitr.iv. I789. 



LrOvv woods ; common. 

 Negundo aceroides, Moeach, Meth. 1794. — ^cfi/- N^gundo, L. 

 Spec. 



Low woods ; abundant. 

 Staphylea trifolia, L. Spec. 



Moist woods; not uncommon. 



A NA CA RDIA CEyE. 



Rhus glabra, L. Spec. 



Open upland woods, especially along the borders; abundant. 

 R. RADiCANS, L. Spec— i?. Toxicodendron, L. Spec. 



Two species, R. raidcans and R. Toxicodendron, were recognized in the Species 

 Plantarum. These are now quite generally considered as but forms of one species, 

 which should take the name having priority of position. Engler ( Anacard. in DC. 

 Men. Phan. iv. 18S3) uses R. Toxicodendron, L. emend, Torr. & Grav,whicli includes 

 four subspecies. The first is the only one with which we are concerned : CC vxilga- 

 ris, Pursh, Fl. Under this two forms are recognized — i . radicans {R. radica>is,'L.); 

 2. foUihilis. DC. Prod. ii. {R. Toxicodendron, L.) 



We have both forms ; 1. climbing high on trunks by rootlets, leaves usually large 

 and entire or sparingly dentate ; frequent on bottom-land. 2. Low, erect, or twin- 

 ing, leaves smaller and iisually deeply notched; found on drier soil, fence rows, etc. 

 But the low form occasionally has entire leaves, and the rooting form dentate leaves. 

 If the latter form is kept as a variety it is R. radicans, L., var. Toxicodendron, 

 Pers. Syn. i. 



POLTGALACE.E. 



PoLYGALA Senega, L. Spec. 



Rich upland woods ; frequent. 

 P. INCARNATA, L. SpeC. 



Moist prairie ; infrequent. 

 P. SANGCINEA, L. SpeC. 



Along sloughs ; frequent. 

 P. VERTICILLATA, L. SpeC. 



Prairie and open woods; infrequent. 



LEGUMINGS^. 



Baptisia leucoph^ea, Nutt. Gen. 

 Prairie; not uncommon. 



B. liEUCANTHA, Torr. «fe Gray, Fl. i. p. .385. 



Low ground ; frequent. 



This appears first as Podalyria alha, Sims, Bot. Mag. 1S09. Eaplitia, Vent, 

 was separated in iSoS. Our plant loses its birthright in the specific name alha by 

 being transferred to Baptisia too late (jff. alba. Hook, Fl. Bor.-Am.), there being 

 already B. alba, R. Br. iSio. 



Trifolium arvease, L. Spec. 



"Ames, 1S71, Besse^'." One specimen in L A. C. herbarium. 



