90 



CENTRAL EXPERIMENTAL FARM 



POLEMONirTM Con. 

 **P. cseruleum, L. Great Valerian, Ja- 

 cob's Ladder. Northern temper- 

 ate regions. 



Syn. P. villosum, Rudolph. 

 PL, 1901. Hardy. Ht. 2i to 3 ft. 

 Fl. blue; May 28 to July 7. 



P, cseruleum acutiflorum. 

 PL, 1901. Half hardy. 



P. caerulenm album. 



PL, 1895. Hardy. Ht. 1 ft. Fl. 

 white; June 6 to July 9. 



P. dissectum, Reichb. = P. sibiricum. 



P. flavum, GREENE. New Mexico. 

 PL, 1907. 



P. foliosissimum, A. GRAY. New Mex- 

 ico, Colorado, &c. 



PL, 1905. Hardy. Ht. 2 ft. II 

 cream colour; June 8 to Oct. 8. 



P. gracile, WILLD. Dahuria. 

 PL, 1907. 



P. grandiflorum, Hort. = P. himalaya- 

 num. 



**P. himalayannm, BAKER. Himalayas. 

 PL, 1901. Hardy. Ht. 2 ft. Fl. 

 blue; May 28 to July 3. 



***P. humile, WILLD. North America. 

 Syn. P. Richardsonii, Grah. 

 PL, 1895. Hardy. Ht. 6 to 12 in. 

 FL pale blue. May and June. 



**P. humile pulchellum. 



Syns. P. pulchellum, Bunge.; P. 



pulcherrimum, Hook. 

 PL, 1895. Hardy. Ht. 6 in. Fl. 



blue; May and June. 



P. lacteum, Lehm. = P. sibiricum, D. 

 Don. 



P. pauciflorum, S. WATS. Mexico. 

 PL, 1907. 



P. pulcherrimum, HooJc* = P. humile 

 pulchellum. 



*P. rep tans, L. North America. ' 



PL, 1894. Hardy. Ht. 18 in. Fl. 

 blue; May 18 to June 12. 



P. Richardsonii, Grah. = P. humile. 



POIEMONITTM Con. 



P. sibiricum, D. DON. Siberia. 



Syns. P. lacteum, Lehm.; P. dissec- 

 tum, Reichb. 



PL, 1901. Hardy. Ht. 2 to 2 ft. 

 Fl. blue; June 14 to July 20. 



P. villosum, Rudolph. = P. cceruleum. 



P. virginianum, H. CAMBE. 



PL, 1901. Hardy. Ht. 2 ft. Fl. 

 blue; June 6 to July 16. 



POIYGONATUM, ADANS. SOLOMON'S 

 SEAL. 



(Liliacece.) 



P. biflorum, ELL. North America. 

 PL, 1895. Hardy. Ht. 1* ft. FL 

 greenish; May 28 to June 12. 



P. latif olium, DESF. Europe, &c. 

 Syn. Convallaria Thunburgii, 



Steud. 



PL, 1898. Hardy. Ht. 1* to 2 ft. 

 FL greenish and white; May 28 

 to June 23. 



P. latif olium commutatum. 



PL, 1895. Hardy. Ht. 3 ft. FL 

 greenish; June 13 to June 25. 



P. macrophyllum, 

 latum. 



= P. verticil- 



**P. multiflorum, ALL. Solomon's Seal, 



David's Harp. Europe, &c. 

 PL, 1900. Hardy. Ht. 1 ft. FL 

 white; May 31 to June 18. 



*P. officinale, ALL. Europe, Himalayas, 



&c. 



PL, 1900. Hardy. Ht. 2 ft. FL 

 greenish white; May 18 to June 

 12. 



P. Thunbergii, Morr. & Decne. = P. 

 latif olium, Desf. 



*P. verticillatum, ALL. Europe, &c. 

 Syn. P. macrophyllum, Sweet. 

 PL, 1900. Hardy. Ht. 2 ft. Fl. 

 white; May 18 to June 19. 



POLYGONUM, L. KNOT GRASS. 



(Polygonacece.) 



**P. alpinum, ALL. South Europe, &c. 

 PL, 1898. Hardy. Ht. 5 ft. FL 

 creamy white; June 17 to Aug. 

 25. 



