Flowering Piants and Ferns from North-Western Greenland. 9 



lersuak: the cespitose growth is not so strongly expressed as in P. 

 abbreviata, more loose-cespitose. The pales have a comhination of the 

 hairiness of both parents. 



Wash. L.: Putlersuak (L. K., 13. VIII, fully developed panicles). 



25. Poa arctica R. Br. 



Murch. S.: Piteravik (11. XI, ample and well developed specimens with 

 large panicles); Igdloluarsuit (15. VIII, fragm. only); Mac Cormick Bay (27. VIII, 

 fully developed panicles). 



P. arctica R. Br. x glauca M. XrU. 



A collection from Rensselaer Bay, Inglefield Land (16. VII, young 

 panicles present), in which the specimens have well developed imder- 

 groimd-stolons, seems to me to answer this combination; it has a 

 shght trace of "vivipary"; confer P. pratensis, f. prolifera. 



26. Poa glauca M. Vahl. 

 Probably common. 



Wash. L.: Morris Bay (10. VI, vigorous specimens from the year before). 



Ingl. L.: Advance Bay (26. VI, new panicles begin to appear); Marshall 

 Bay (2. VII, new panicles developed). 



Murch. S.: Piteravik (10. XI, fragm. only); Igdloluarsuit (9. VIII, very 

 coarse and broad-leaved specimens from manured clayey soli). 



27. Poa pratensis L., f. prolifera. 



ofr. Ostenfeld, in Medd. Gronl. LXIV, p. 197 (1923). 



Wash. L.: Putlersuak (L. K., 13. VIII, fully developed viviparous panicles). 



LiNDMAN^) suggests, that the proliferous viviparous Poa's from 

 arctic countries mostly are hybrids, and probably he is right in his 

 hypothesis. Which combination the so-called P. pratensis f. prolifera — 

 also reported fromWolstenholme Sound, and f urther southwards — really 

 is, 1 dåre not answer with certainity, most probably it is P. arctica x 

 glauca. 



28. Puccinellia angustata (R. Br.) Rand et Redf. 



Wash. L.: Putlersuak (L. K., 13. VIII, spikelets already nearly empty). 



29. Puccinellia phryganodes (Trin.) Scribn. et Mers. 



Wash. L.: Putlersuak (L. K., 13. VIII, spikelets present). 

 Ingl. L.: Rensselaer Bay (20. VII, no spikelets, only stolons). 



^) In B.Lynge: Vascul. Piants from Nov. Zemlya. — Rep. Norw. Exp. Nev- 

 Zemlya 1921, no. 13, Kristf&nia (1923) 1924, p. 112. 



