656 FLORA. 



rulate, 2.5-7.5 cm. long; flowers erect, rose-purple, about 2.5 cm. broad; petals 

 pubescent at the base within; capsule stalked, 5-7.5 cm. long, about 2 mm. thick; 

 seeds about 1 mm. long; coma whitish. In waste places, eastern N. Eng., N. Y., 

 Out. and in ballast about the seaports. Adventive from Europe. June-Sept. 



2. Epilobium alpinum L. Alpine Willow-herb. (I. F. f. 2569.) Slender, 

 glabrous or nearly so, 8-30 cm. high. Leaves pale, petioled, opposite, or the 

 upper alternate, obtuse or obtusish at the apex, 12-20 mm. long; flowers few, 

 nearly erect, 4-8 mm. broad; stigma nearly entire; capsules slender-stalked, 

 2.5-5 cm. long, about I mm. thick; seeds beaked. Lab. to Br. Col., N. H., Utah 

 and Ore. Also in Europe. Summer. 



3. Epilobium anagallidifdlium Lam. Pimpernel Willow-herb. (I. F. f. 

 2570.) Low, usually tufted, 5-15 cm. high, resembling the next preceding 

 species. Stems commonly pubescent in lines and nodding at the apex; leaves 

 oblong or narrowly ovate, obtuse at the apex, short-petioled, 10-20 mm. long; 

 flowers few, clustered, nodding, about 5 mm. broad; stigma entire; capsule slender- 

 pedicelled, about 2.5 cm. long, I mm. wide; seeds smooth, short-beaked, about 

 1 mm. long. Lab. and through arctic Am. to Alaska, south in the Rocky Mts. to 

 Nev. Also in Europe and Asia. Summer. 



4. Epilobium palustre L. Marsh or Swamp Willow-herb. (I. F. f. 

 2571.) Erect, usually simple, 1.5-4 dm. high, canescent above with incurved 

 hairs. Leaves mostly opposite, lanceolate-oblong, obtuse or subtruncate at the 

 apex, 2.5-5 cm. long, erect or ascending, distinctly veined; flowers few, pink or 

 whitish, usually nodding at first, 4-6 mm. broad; fruiting pedicels slender; cap- 

 sules 2.5-5 cm * l° n &> slightly more than 1 mm. thick; seeds about 1 mm. long, a 

 little papillose translucent, the apex scarcely narrowed. In bogs, N. B. to Alaska, 

 the White Mts., Ont, Colo, and Wash. Also in Europe and Asia. Summer. 



5. Epilobium lineare Muhl. Linear-leaved Willow-herb. (I. F. f. 

 2572.) Slender, canescent throughout with incurved hairs, 3-6 dm. high, at 

 length much branched. Leaves linear or linear-lanceolate, mostly short-petioled, 

 opposite or alternate, acute at both ends, 2.5-5 cm - l° n g> the veins obscure; flowers 

 erect, pink or whitish, 4-8 mm. broad; stigma entire or slightly notched; pedicels 

 mostly slender; capsules about 5 cm. long; seeds less than 2 mm. long, slightly 

 papillose. In swamps, N. B. to Del., W. Va., Br. Col., the Ind. Terr, and Wyo. 

 July-Sept. Sometimes produces bulblets near the base of the stem. 



6. Epilobium strictum Muhl. Downy or Soft Willow-herb. (I. F. f. 

 2573.) Erect, usually much branched, 3-9 dm. high, glandular-pubescent with 

 whitish somewhat spreading hairs. Leaves broader than those of the next preced- 

 ing species, lanceolate, obtuse or obtusish, 1. 8-4 cm. long, mostly entire, evidently 

 veined; flowers pink or whitish, about 4-5 mm. broad; capsules nearly 2mm. thick, 

 short-pedicelled; seeds obconic, papillose. Bogs, Me. toW. Ont. and Minn., south 

 to Va. and 111. July-Sept. 



7. Epilobium paniculatum Nutt. Panicled Willow-herb. (I. F. f. 2574.) 

 Annual, slender, 3-6 dm. tall, loosely branched, glandular-pubescent above. 

 Leaves alternate, varying from linear to linear-lanceolate, 2.5-7.5 cm. long, den- 

 ticulate or nearly entire, attenuate into slender winged petioles; calyx often purple, 

 its tube funnelform, 2-3 mm. long, shorter than the lanceolate segments; petals 

 cuneate, notched, 6-8 mm. long, violet; capsules ascending, linear-fusiform, 2-3 cm. 

 long, curved; seeds obovoid, 2 mm. long, black, slightly papillose. Lake Huron 

 to Br. Col., Colo., Ariz, and Cal. Summer. 



8. Epilobium coloratum Muhl. Purple-leaved Willow-herb. (I. F. f. 

 2575.) Erect, much branched, 3-9 dm. high, more or less canescent above with 

 incurved hairs often arranged in lines. Stem and leaves often purplish; leaves 

 generally slender petioled but sometimes sessile, lanceolate, acute or acuminate at 

 the apex, sharply serrulate or denticulate, 5—15 cm. long; flowers numerous, pink 

 or white, 4-6 mm. broad, generally nodding; capsules short-pedicelled, finely pu- 

 bescent, 2.5-5 cm - l° n ^- about 2 mm. thick; seeds papillose, less than 2 mm. long. 

 In low grounds, Me. to Ont., Wis., S. Dak., S. Car. and Kans. July-Sept. 



9. Epilobium adenocaulon Iiaussk. Northern Willow herb. (I. F. f. 

 2576.) Closely resembling the next preceding species, but the inflorescence and 

 capsules glandular pubescent. Leaves lanceolate or ovate-lanceolate, obtusish or 

 sometimes acute, sparingly serrulate or denticulate, seldom over 6.5 cm. long; 



