16 MICHIGAN ACADEMY OF SCIENCE. 



limbs, and looking at a distance not unlike the masts of some great harbor. 

 Thousands of such acres, repellant alike to botanist and settler, can be 

 seen in any of our northern counties. 



"In certain districts considerable beech is found associated with the 

 pine. The soil of such tracts is usually of better quality, and can be 

 rendered productive without much labor. It may be noted that in such 

 cases the pine also grows thriftier and makes better lumber." 



FLORA OF THE JACK-PINE PLAINS. 



The plants of this region are all found in one or more of the regions 

 previously enumerated. 



The soil of these plains is mainly sand of considerable depth which dries 

 out quickly after a rain, and is then especially liable to be burned over, 

 the burning often destroying every living plant above the surface of the 

 soil. In this way. by repeated burning, much of the vegetable matter is 

 removed, leaving the surface soil thin. 



The following seventy species of plants are almost certain to be found 

 in considerable quantity on any extended area of Jack-pine plains : 



a. Those most coiiiiox. 



Amelanchier Botryapium (L. f.) DC Shad-bush. 



( Amelanchier Canadensis var. ohlongifolia T. & G.) 



Andropogon furcatus Muhl. Finger, or Beard-grass. 



Andropogon scoparius Michx. Beard-grass. 



Arctostaphylos Uva-Ursi (L.) Sprang. Bearberry. 



Aster Iffivis I>. Smooth Aster. 



Carex Pennsylvanica Lam. Pennsylvania Sedge. 



Comptonia peregrina (L.) Coulter. 



(Myrica asplenifolia L.) 



Danthonia spieata (L.) Beauv. Wild Oat-grass. 



Epigasa repens L. Trailing Arbutus. 



Gaultheria procumbens L. Wintergreen. 



Leptilon Canadense (L.) Britton. Horse-weed. 



{Erigeron Canadensis L.) 



Oryzopsis juncea (Michx.) B. S. P. Mountain Rice. 



(Oryzopsis Canadensis Torr.) 



Pinus divaricata (Ait.) Gotd. Gray Pine. Jack Pine. 



(Pinus Banksiana Lambert.) 



Populus tremuloides Michx. Aspen. 



Prunus Pennsylvanica L. f. Wild Red, or Pin Cherry. 



Prunus pumila L. Sand Cherry. 



Prunus Virginiana L. Choke-Cherry. 



Pteridium aquilinum (L.) Kuntze. Eagle Fern. 



{ Pteris aquilina L.) 



Quercus coccinea Wang. Scarlet Oak. 



Quercus velutina Lam. Black Oak. 



{Quercus tinctoria Bartram.) 



Rumex Acetosella L. Sheep Sorrel. 



Salix humilis Marsh. Low willow. 



Solidago nemoralis Ait. Golden Rod. 



Vaccinium Canadense Richards. Low Blueberry. 



Vaccinium Pennsylvanicum Lam. Dwarf Blueberry. 



Vaccinium vacillans Kalm. Low Blueberry. 



b. Those less feequent. 



Adopogon Virginicum (L.) Kuntze. Dwarf Dandelion. Virginia Goatsbeard. 

 {Krigia amplexicaulis Nutt.) 

 Agrostls hyemalis (Walt.) B. S. P. 

 (Agrostis scabra Willd.) Hair-Grass. 



