BOTANICAL GAZETTE. 107 



Potaniogeton perfoliatus, L., var. lanceolatus, Robbins, occurs 

 here, and northward to Petoskey (C. F. Wheeler). 



Pinus Strobus, L., reaches its southern limit in the center of 

 the state at Mason, near Lansing. It follows the Michigan Lake 

 shore down into Indiana however. P. Banksiana, Lam., is common 

 on light land as far south as the middle of the lower peninsula, and 

 is then not known to occur again till we reach the head of the Lake, 

 where it is quite abundant. It there reaches its southern limits. 



Tsuga Canadensis, Carr., the hemlock spruce, reaches about 

 its southern limits here, where it is the leading forest tree. It does 

 not occur in Indiana. 



Betula lutea, Mx. f., approaches its southern limits here. B. 

 papyracea, Ait., occurs near the head of the Lake (E. J. Hill), prob- 

 ably its extreme southern limit. 



Calamintha Clinopodium, Benth., also reaches its southern 

 limits here. It is undoubtedly indigenous. (''Indigenous about 

 the upper Great Lakes and elsewhere 1 ' — Gray's Man.) 



Chimaphila maculata, Ph., approaches its northern limits at 

 South Haven, although it occurs sparingly as far north as Ionia. 

 ( Wheeler & Smith's Cat.) 



Vacci nium vacillans, Sol., the principal dry-land blue-berry of 

 the upper Lake region, occurs occasionally as far south as the 

 central part of Indiana (Ind. Cat). At South Haven it is the leading 

 upland berry, from this point it seems to dwindle away to the 

 south. 



Artemisia Canadensis, Mx., probably follows the shores of the 

 Lake generally. It occurs here in great abundance, and at the 

 head of the Lake (E. J. Hill), probably its southern range. 



Solidago Virga-aurea, L., var. humilis, Gray, follows the Lake 

 shore southward to this place. It is not known to occur farther 

 south. 



Comus Canadensis, L., occurs in abundance, and strays as far 

 south as central Indiana (Ind. Cat.), apparently far beyond its 

 usual range. 



Aralia hispida, Mx., reaches its southern limit in the West 

 at South Haven where it is abundant. AAqUinquefolia Decs. & 

 Planch., also occurs, but is very rare. 



Opuntia Rafinesquii, Englm., seems to prefer the sheltered in- 

 terior to the Lake shores. It occurs as far north as the center of 

 the lower peninsula (Wheeler & Smith's Cat). 



Prunus Pennsglvanica, L., approaches its southern limits here, 

 while P. serotina, Ehr. , takes its place, and begins to approach its 

 northern limits, although it occurs considerably farther north 

 toward the center of the state. 



Phaseolus diversif alius, Pers., probably reaches ; here, its 

 northern limits as also Limim Virginianum, L. 



