Mar., 1915.] Onagrnceae of Ohio. 465 



3. Chamaenerion (Tourn.) Adans. 



Perennial herbs with ahernate, entire leaves, densely set on 

 the stem; flowers showy, in tenninal racemes; sepals 4, purple, 

 linear, deciduous; petals 4 ovate, stamens 8, stigma 4-parted; 

 capsule angled, dehiscent opening longitudinally, seeds tufted. 



1. Chamaenerion angustifolium (L.) Scop. Fire-weed. 

 Erect herbs 1>^-S ft.; leaves lanceolate, entire, l>^-5 in. long; 

 flowers purple or white about 1 in. broad, capsules l>^-2 in. long, 

 slender, white pubescent. Ashtabula, Stark, Lake, Medina, Erie, 

 Cuyahoga, Williams, Summit, Geauga, Lorain, Deflance, Fulton. 



4. Epilobium L. 

 Herbs with opposite or alternate leaves; flowers soHtary, 

 spicate, or racemose; calyx deciduous, 4 parted; petals 4, stamens 

 8, capsule long, slender 4-sided dehiscent longitudinally; seeds 

 tufted with hairs. 



1. Leaves entire, margins revolute. 2. 



1. Leaves denticulate or serrulate; margins not revolute. 3. 



2. Leaves narrowly linear, less than J^ in. wide, veins obscure; entire plant 



covered with white incurved hairs giving it a gray green appearance. 



E. I in ear e. 



2. Leaves lanceolate 34 in. or more wide, veins evident; glandular pubescent 



hairs spreading. E. strictimi. 



3. Leaves narrowly lanceolate, 2-6 in. long; seeds obconic, bcakless; coma 



red-brown. E. coloratum. 

 3. Leaves ovate-lanceolate, rarely over 2li in. long; seeds ellipsoid, 

 short-beaked; coma white. E. adenocaiiloii. 



1. Epilobium lineare Muhl. Linear-leaf Willow-herb. 

 Erect, perennial, much branched herbs 1-2 ft. high, the entire 

 plant covered with white incurved hairs; leaves linear ^2-1)4 in. 

 long, opposite or alternate, entire, margin revolute; flowers pink 

 or white in the axils of upper leaves of the branches; capsules 

 about 2 in. long. Erie, Clarke, Portage, Ottawa. 



2. Epilobium strictum Muhl. Downy Willow-herb. 

 Erect herbs 1-8 ft. high, pubescent with white spreading hairs; 

 leaves sessile, lanceolate, }4-2 in. long, opposite or alternate, 

 entire, flowers in the axils of the upper leaves of branches, }i in. 

 broad, pink or white; capsules about 2 in. long. Licking County. 



3. Epilobium coloratum Muhl. Purple Willow herb. Erect, 

 branched herb, 1-3 ft. tall, somewhat canescent, often purplish; 

 leaves narrow lanceolate, sharply dentate 2-6 in. long; flowers 

 many, axillary, pink and Avhite about }4 in. broad, seeds obconic, 

 beakless; coma reddish-brown. General. 



4. Epilobium adenocaulon Haussk. Northern Willow-herb. 

 Resembling the above species but leaves broader and rarely 

 exceeding 2>^ in. in length; seeds obovoid, short -beaked; coma 

 white. Cuyahoga, Ashtabula, Defiance, Erie, Medina, Ottawa, 

 Summit, Franklin. 



