Genus 6. 



EVENING-PRIMROSE FAMILY. 



7. Epilobium paniculatum Nutt. Panicled 

 Willow-herb. Fig. 3033. 



E. paniculatum Nutt. ; T. & G. Fl. N. A. i : 490. 1840. 



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

 brous below, glandular-pubescent above, the stem 

 terete. Leaves alternate, varying from linear to 

 linear-lanceolate, I's' long, acute, denticulate or 

 nearly entire, attenuate into slender winged petioles, 

 often involutely folded ; pedicels subtended by nar- 

 row bracts or bearing these some distance from their 

 bases ; calyx often purple, its tube funnelform, 1"- 

 ij" long, shorter than the lanceolate segments; 

 petals cuneate, notched, 3"-4" long, violet; capsules 

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

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



Lake Huron (according to Macoun) ; South Dakota to 

 Alberta, to British Columbia, Colorado, Arizona and 

 California. Summer, 



8. Epilobium coloratum Muhl. Purple- 

 leaved or -veined Willow-herb. Fig. 3034. 



Epilobium coloratum Muhl.; Willd, Enum. i: 411. 

 1809. 



Erect, much branched, bushy, l°-3'' high, more 

 or less canescent above, with incurved hairs 

 often arranged in lines, glabrate below. Stem 

 and leaves often purplish; leaves generally 

 slender-petioled but sometimes sessile, narrowly 

 lanceolate, acute or acuminate at the apex, nar- 

 rowed at the base, sharply serrulate or denticu- 

 late, 2'-6' long, 3"-8" wide ; flowers numerous 

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

 erally nodding; stigma entire or merely notched; 

 capsules short-peduncled, finely pubescent, i'-2' 

 long, about i" thick; seeds obconic-fusiform, 

 beakless, papillose, less than i" long; coma red- 

 dish-brown. 



In low grounds, Maine to Ontario, Wisconsin, 

 Nebraska, South Carolina, Tennessee and Kansas. 

 Ascends to 2000 ft. in Virginia. Autumn basal 

 shoots forming rosettes of leaves, as in the follow- 

 ing species. July-Sept. 



9. Epilobium adenocaulon Hatissk. 

 Northern Willow-herb. Fig. 3035. 



Epilobium glandulosum Lehm. in Hook. Fl. Bor 

 Am. I : 206. 1833 ? 



Epilobium adenocaulon Haussk. Oest. Bot. Zeit. 

 29: 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 24' long; 

 flowers usually nodding at first; seeds ob- 

 ovoid, abruptly short-beaked, about ¥' long, 

 papillose; coma white. 



In moist grounds, Newfoundland to British 

 Columbia, Massachusetts, Delaware, North Caro- 

 lina, Iowa, New Mexico and California. Ascends 

 to 4000 ft. in the Adirondacks. July-Sept. 



38 



