1908] СоШпз,— Genus Pilinia 127 
cells about as long as broad, terminating in articulate hairs or ovoid- 
elliptic cells; sporangia terminal, clavate, 11-12 X 16-21 м; color 
green. Greenland. 
This species indicates the connection between Pilinia and Chaeto- 
phora; instead of an extended layer it forms roundish gelatinous 
thalli, forming, with Calothrix species, etc., a continuous stratum 
near high water mark. In 1884 the writer reported! its occurrence 
at Kennebunkport, Maine, but it has not since been seen, and sub- 
sequent examination of the material in question failed to show it, 
so that the report is now unconfirmed by any specimen. There is 
no reason, however, why it should not be found on the Maine coast, 
in company with other arctic forms. 
MALDEN, MASSACHUSETTS. 
- 
EXPLANATION OF PLATE 77. 
Pilinia Lunatiae, portion of basal layer. 
Fig. two erect filaments with branches. 
Fig. ` filament with emptied sporangium. 
Fig. 1 
2 
3. 
Fig. 4. P. Morsei, section of basal layer with cells longitudinally divided, 
5 
6 
“ “ 
and two erect filaments. 
P. Morsei, basal layer more developed, with long and short filaments 
and new and old sporangia. 
P. Morsei, suecessive sporangia on short filament. 
Fig. 
Fig. 
ACHILLEA TOMENTOSA АТ WESTFORD, MASSACHUSETTS.— Between 
1884 and 1888 I found at Westford, a striking vellow-flowered species 
of yarrow, since identified as Achillea tomentosa L., a native of southern 
and central Európe. It was in a field with other plants, introduced 
through the generous use of wool waste as a fertilizer. Some of the 
Achillea was transplanted to a private garden, where it still persists 
after twenty years, though in the field where it originally grew it has 
disappeared. As now applied the wool waste is kept until it decom- 
poses sufficiently to kill the weed seeds it so often contains — a pro- 
cedure more favorable to good agriculture than productive of botanical 
rarities.— Еми Е. FLercHer, Westford, Massachusetts. 
1 Bull. Torrey Bot. Club, Vol. XI, p. 130. 
