108 CATALOG OF PLANTS. 



653. Fraxinus pennsylvanica lanceolata (Borkh.) Sarg. Green ash. 



— In rich woods at Bayport. Apparently infrequent. 



654. Fraxinus nigra Marsh. Black ash. — Frequent in swamps and 



wet places with other trees. Reported as formerly very 

 abundant, but it has been mostly destroyed by drainage 

 and fires. 



655. Syringa vulgaris L. Common lilac. — Frequent as an escape in 



villages and near country dwellings. 



656. Ligustrum vulgare L. Privet. — On Stony Island, apparently 



persisting in an old garden or yard. 



657. Gentiana crinita Froel. Fringed gentian.; — Frequent on damp 



ground near the lake shore from Grindstone City to Harbor 

 Beach. 



658. Gentiana andrewsii Griseb. Closed gentian. — Abundant on 



flat damp ground near Harbor Beach. 



659. Menyanthes trifoliata L. Buckbean. — Common in very wet 



places and often in shallow water. 



660. Apocynum androsaemifolium L. Spreading dogbane. — Fre- 



quent on open dry ground in open woods, and on shaded 

 sand dunes. 



661. Apocynum cannabinum L. Indian hemp. — On the bank of a 



stream near Sebewaing. "Stream banks near Port Austin." 

 Davis. 



662. Apocynum cannabinum pubescens (R. Br.) DC. Velvet dog- 



V)ane. — "Charity islands." Winchell's catalogue. 



663. Apocynum cannabinum hypericifolium (Ait.) Gray. Clasping- 



leaved dogbane. — Common on marshy ground, the prevail- 

 ing form in the sand region. 



664. Asclepias tuberosa L. Butterfly- weed. — Frequent on flat sandy 



ground and sand dunes. 



665. Asclepias purpurascens L. Purple milkweed. — Reported as 



found in Tuscola County by Davis. 



666. Asclepias incarnata L. Swamp milkweed. — Common in wet 



and swampy places. 



667. Asclepias syriaca L. Common milkweed. — Common on flat 



sandy ground and sand dunes. Often growing on drifting 

 sand near the lake shore, and acting as a sand binder. Very 

 abundant on the sandy shore at Port Austin. 



668. Asclepias suUivantii Engelm. Sullivant's milkweed. — "Common 



on ]n-airie-like land, Akron Township, Tuscola County." 

 Davis. 



669. Acerates floridana (Lam.) Hitchc. Florida milkweed. — Com- 



mon on prairie-like ground l^etween Bayport and Sebe- 

 wains;. 



