l894-J PLANTS OF MONROE COUNTY. 63 



300. P. arbutifolia L.f. var. melanocarpa Hook. [Aronia nigra (Willd.) Britt.] 



Abundant in the marshes at Mendon ponds. 



301. P. Americana DC. '^Soj-bus Amcrica7iaVi.^x'i\\.?\^ American Mountain 



Ash. Escaped from cultivation. 



302. P. Aucuparia Gaertn. European Mountain Ash. 



Several specimens in woods on the bank of Genesee river. 



I2J. CRA T.EGUS L. 



303. C. OXYACANTHA L. ENGLISH HAWTHORN. 



Infrequent. Bank Genesee river, below lower falls. Gates. Adams 

 Basin. Wayne county. 



304. C. coccinea L. Scarlet Thorn. 



Thickets and hillsides ; frecjuent. Common along the banks of the 

 Genesee river. 



305. C. tomentosa L. Black Thorn. 



Thickets along the river banks, old pastures, etc. ; scarce. 



306. C. tomentosa L. var. pyrifolia Gray. 



Same range as the preceding ; scarce. 



307. C. punctata Jaccj. [C. tomentosa var. punctata Gray.) 



River banks and flats, fields, thickets, etc. ; common. Occasionally 

 with yellow fruit. 



308. C. Crus==galli L. Cock-spur Thorn. 



River banks and flats; rare. A fine specimen in Genesee Valley park. 

 Wayne county, E. L. Hankenson. 



124. AMELANCIIIER Medic. 



309. A. Canadensis Torn & Gray. \/l. Caiuidaisis (L.) Medic] Shad-bush. 



River banks, ravines, thickets, woodlands ; common. 



310. A. Canadensis var. rotundifolia T, & G. \^A. rotiindifolia (Mx.) Rcem.] 



Plentiful on the banks of Genesee river and Irondequoit bay. 



311. A. Canadensis var. (?) oblongifoiia T. & G. {A.Botryapium (L. f.) D.C.] 



Ravines and low grounds. 



SAXIFRAGACE^. 



125. SAXIFRAGA L. 



312. S. Virginiensis Michx. Early Saxifrage. 



River banks, ravines, hillsides ; abundant, except in the western part 

 of our district. 



313. S. Pennsylvanica L. Swamp Saxifrage, 



Cold swamps; infrequent. Irondequoit, D?: CM. Booth/ Greece, 

 Miss Beckivith and aMiss Macaulcy. Adams Basin, Prof. IV. H. Len/ion. 

 Fisher's Station, AI. S. Baxter. Wayne county, E. L. Hankenson. 



126. TIARELLA L. 



314. T. cordifolia L. False Mitre-wort. 



Hilly woods, river banks and ravines ; common. 



