CATALOGUE OF PLANTS. 147 



This species and others, especially S. discolor, often hear cone- 

 shaped galls on the ends of the branches. These consist of im- 

 bricated leaves, and are caused by the deposit of eggs of insects. 



S. tristis, Ait. Dwarf Gray Willow. 



Rare. Hollows, between Northeast Harbor and Little Har- 

 bor (Rand). Perhaps introduced in this locality from beyond 

 our limits. 



S. petiolaris, Smith. 



Frequent. Somesville; Bass Harbor Marsh; Great Cran- 

 berry Isle; Long Pond meadows, etc. (Rand). The type passes 

 into the next variety. 



Var. angustifolia, Anders. S. rosmarinifolia (Herb. Hook.), 

 Barratt & Hooker. 



Leaves narrowly lanceolate, almost linear, margin slightly 

 serrulate or subentire, glaucous beneath, at first silky, at length 

 glabrate. DC. Prod., xvi. 2. 234. Common on meadows and 

 heaths. Long Pond meadows ; Pond Heath ; Northeast Meadow, 

 etc. (R. & R.). The silky hairs of the young leaves are usu- 

 ally of a rusty color. 



S. cordata, Muhl. Heart-leaved Willow. 



Rare. Roadside near Denning Pond ; Southwest Harbor 

 (Rand). 



S. balsamifera (Hook.), Barratt. Balsam Willow. 



Widely distributed, but nowhere very abundant. Southwest 

 Harbor; Sargent Mt. ; Beech Hill; Ripples Pond; Somes Pond; 

 Denning Brook; Beech Mt. Notch; The Hio; Doctors Brook; 

 road, west side of Browns Mt., etc. (Rand) ; — Seal Harbor 

 (Redfield); — Browns Mt. (E. Faxon); — High Head meadow 

 (Faxon & Rand); — Long Pond meadows (R. & R.). 



POPULUS, L. Poplar. Aspen. 

 P. tremuloides, Mx. Aspen. 

 Frequent in woods. 



