PENTANDR1A O1GVNIA. 337 



A. phitolaccoides : stem erect, simple ; leaves broad-lanceolate, acumi- 

 nate, smooth, pale beneath ; umbels many-flowered, lateral and tez- 

 minal, solitary, on long peduncles, nodding ; nectary bidendate. 



HAB. Shady wet places. June July, Tj- 5 stem 3 ~ 4 feet high ; 

 leaves large; umb. 6 1Q-JI. ; Jl. greenish purp. 



A. obtusifolia: leaves amplexicaul, oblong, obtuse, undulate, very 

 smooth, glaucous beneath ; umbel terminal, long-pedunculate, gener- 

 ally solitary ; nectary slightly 2-toothed ; horns exserted. 



A., incarnata : stem erect, branched above, tomentose, leaves subses- 

 sile, lanceolate, tomentose, umbels erect, generally by pairs ; nectary 

 entire ; horns subulate, exserted. 



fJAB. Wet places. 1\.; stem 2 3 feet high; umb. numerous, 

 crowded ; Jlowers pale-pui~p. ; nectary truncate. 



5. pulchra : stem and leaves very hairy. 



1. debilis: very smooth; stem erect, weak, simple; leaves petiolate, 

 oval-lanceolate, acute at each extremity, membranaceous ; umbels 

 terminal, loose. 



iAB. Shady rocky places. 7j. ; leaves large ; Jlowers white. 



i. quadrifolia: stem erect, simple, smooth; leaves by fours, ovate, 

 acuminate, .petiolate ; umbels 2, terminal, erect, loose ; pedicels ca- 

 pillary ; nectary bidendate ; horn very short. 



#AB. Dry stony woods. June, 7J. ; stem 18 inches high ; leaves 

 mostly 8 ; 2 middle pairs approx. ; umb. on long pedunc. ; Jl. small, 

 white. 



A., viridiftora : stem erect, simple, hairy ; leaves oblong, on short pe- 

 tioles, tomentose-pubescent on both sides, obtuse; umbels lateral, 

 solitary, subsessile, nodding, dense ; horns of the nectary wanting. 



'iAB. Sandy fields. July, I}.; stem 2 feet high, densely pubes.; 

 leaves thick ; umb. subglob. ; Jl. green. 



'. lanceolata : leaves lanceolat ", acute. 



:. obovata : leaves obovate. 



A. verticillata : stem simple, marked with pubescent lines; leaves 

 mostly verticillate, narrow-linear, revolute; nectaries short, biden 

 date ; horns falcate, much exserted. 



tIAB. Dry hills. July, 1\.; stem about 3 feet high, very slender ; 

 whorls 5 6-leav. ; Jl. small, whitish. 



* * Leajlets alternate. 



A., tuberosa : stem erect, hairy, with spreading branches; leaves ob- 

 long-lanceolate, sessile ; umbels numerous, forming terminal co- 

 rymbs. 



HAB. Sandy fields. Aug. 7|. ; root large, tub.; stem 3 feet high ; 

 Jlower large, bright orange. 



128. GENTIANA. Gentian. 



G. saponaria: leaves ovate-lanceolate, acute, 3-nerved; flowers ver- 

 ticillate-capitate, sessile ; corolla ventricose, closed, 10-cleft ; interior 

 segments unequally 3-cleft, as long as the exterior ones ; segments 

 of the calyx ovate, shorter than the tube. 



HAB. Wet meadows. Sept. Oct. 1|_; stem 18 in. high, simp.; 

 leaves opposite ; Jl. very large, bright blue. 



G. quinqueflora : stem quadrangular, branched; leaves ovate-lanceo- 

 late, acute, 3-nerved ; flowers somewhat in fives, terminal and axil- 



