IQO 



obtained throngli a seed liouse in Ithaca ; b, from a seed house in 

 New York City, which furnished also samples of all the kinds of 

 seeds used in the experiment ; c, common commercial seed ob- 

 tained in Ithaca. Plats a asid b are completely covered with an 

 abundant growth of grass, from which a considerable cutting 

 could now be made. Plat c is onh^ about half covered. None of 

 the plats have seeded except very sparingly. 



2. Wire-grass. Blue-grass. i^Poa compressa.^ Onh' about half 

 the ground is covered, and the plants are growing in rather large 

 separate stools. The plants blossomed and fruited freel3^ Old 

 seed stalks are still abundant. 



3. Fowl Meadow-grass. False Red-top. {^Poa serotina.') The 

 plot is well seeded, fully ninety per cent of the ground being 

 covered. Flowered and seeded freely, the old stalks being still 

 abundant, as in the last. 



4. Rough Meadow grass. {^Poa In'vialis.) The plat is poorly 

 seeded, not more than half covered. The seed was poor and ob- 

 viously in part untrue to name. 



5. Wood Meadow-grass. {Poa nemoralis.) A few plants, ap- 

 parentl}' true to name. 



6. Water Meadow-grass. {Poa aquatica.') Only a few plants, 

 and these of uncertain identity. 



The notes here given indicate the great difficulty of obtaining 

 a satisfactory seeding with commercial grass seed, especially as 

 regards those kinds less generally in use. The field experiments 

 here noted correspond in all important respects with pot experi- 

 ments in the green house ; but the results of the whole series of 

 experiments will be hereafter more carefully and fully elaborated. 



ON ROOT-PROPAGATION OF CANADA THISTLE. 



A considerable study of the Canada thistle has been made dur- 

 ing the past season with reference to its power of propagating it- 

 self both by seeds and by under-ground roots. The study is 

 still in progress, but it may be worth while to note at this time 

 some of the results of experiments on root-propagation. 



A number of plants were dug from a field of sandy soil, April 1 1, 

 1889. At this time the young plants had begun to grow, the 

 leaves being from one to two inches in length. From the roots 

 two sets of cuttings were made, the first, marked A in the table, 



