ONAGRACEAE. 



[Vol.. II. 



7. Epilobium paniculatum Nutt. Pan- 

 icled Willow-herb. (Fig. 2574.) 



Epilobium paniculatum Nutt.; T. & G. Fl. N. A. i: 

 490. 1840. 



Annual, slender, i-2 tall, loosely branched, 

 glabrous below, glandular-pubescent above. Leaves 

 alternate, varying from linear to linear-lanceolate, 

 I '-3' long, acute, denticulate or nearly entire, at- 

 tenuate into slender winged petioles, often invo- 

 lutely folded; pedicels subtended by narrow bracts 

 or bearing these some distance from their bases; 

 calyx often purple, its tube funnelform, \"-\W 

 long, shorter than the lanceolate segments; petals 

 cuneate, notched, ^"-d," long, violet; capsules as- 

 cending, linear-fusiform, io"-i5" long, curved; 

 seeds obovoid, i" long, black, slightly papillose. 



Lake Huron to British Columbia, Colorado, Arizona 

 and California. Summer. 



\\ 



8. Epilobium coloratum Muhl. Purple-leaved Willow-herb. (Fig. 2575.) 



Epilobium coloratum Muhl.; Willd. Knum. i: 

 411. 1809. 



Erect, much branched, bushy, l-3 high, 

 more or less canescent alx>ve, with incurved 

 hairs often arranged in lines, glabrate below. 

 Stem and leaves often purplish; leaves gener- 

 ally slender-petioled but sometimes sessile, 

 lanceolate, acute or acuminate at the apex, 

 narrowed at the base, sharply serrulate or den- 

 ticulate, 2 / -6 / long, 3"-S" wide; flowers nu- 

 merous in the axils, pink or white, 2"-3" broad, 

 generally nodding; stigma entire or merely 

 notched; capsules short- peduncled, finely pu- 

 bescent, i '-2' long, about i" thick; seeds 

 obconic-fusiform, beakless, papillose, less than 

 i" long; coma reddish-brown. 



In low grounds, Maine to Ontario, Wisconsin, 

 Nebraska, South Carolina, and Missouri. As- 

 cends to 2000 ft. in Virginia. July-Sept. 



9. Epilobium adenocaulon Haussk. 

 Northern Willow-herb. (Fig. 2576.) 



Epilobium glandulosum Lehm. in Hook. Fl. 



Bor. Am. i: 206. 1833? 

 Epilobium adenocaulon Haussk. OEst. Bot. Zeit. 



39:119. 1879. 



Closely resembling the preceding species, 

 but the inflorescence and capsules glandular- 

 pubescent. Leaves lanceolate or ovate-lan- 

 ceolate, obtusish or sometimes acute, sparingly 

 serrulate or denticulate, seldom over 1%,' long; 

 flowers usually nodding at first; seeds ob- 

 ovoid, abruptly short-beaked, about l / 2 " long, 

 papillose; coma white. 



In moist grounds, New Brunswick to Oregon, 

 south to Massachusetts, Pennsylvania, Iowa, 

 Utah and California. Ascends to 4000 ft. in the 

 Adirondacks. July-Sept. 



