Bulletin - United States National Museum - Smithsonian Institution
Bulletin - United States National Museum - Smithsonian Institution
Bulletin - United States National Museum - Smithsonian Institution
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FLORA OF WASHINGTON AND VICINITY. 31<br />
Ehus aromatica April 14, 1878<br />
Phlox subulata April 14, 1878<br />
Arabis patens April 18, 1880<br />
Cardamine liirsuta, var. sylvatica April 18, 1880<br />
Negundo aceroides April 18, 1880<br />
Erigeron bellidifolius April 18, 1880<br />
Krigia Virginica Ajiril 18, 1880<br />
Sisyrinchium anceps April 18, 1880<br />
Carex laxiflora April 18, 1880<br />
Carex Emmonsii April 18, 1880<br />
Melica mutica April 18, 1880<br />
Aueinone nemorosa April 19, 1874<br />
Viola cucullata, var. cordata Aj)ril 19, 1874<br />
Dirca palustris — April 19, 1874<br />
Carex Penusylvauica April 19, 1874<br />
Lathyrus veuosus April 21, 1878<br />
Kibes rotundifoliuni April 21, 1878<br />
Salix nigra, var. Wardi . . April 21, 1878<br />
We thus see that a single collector has, in the course of eight years^<br />
operations, actually observed and noted 11 species in bloom in Febru-<br />
ary, 24 more in March, 51 additional in the first week of Ai)ril, and 26<br />
others during the second and third weeks of April, or 112 up to April 21.<br />
It should be remarked that there is no doubt tliat if the same locali-<br />
ties in which the large number were observed on April 2, 187C, April 4,<br />
1880, and April 7, 1878, had been visited in the last days of March of<br />
those years, quite a number of these plants would have been found suf-<br />
ficiently advanced to demand a place in the lists, and thus the month<br />
of March would have been credited with so many here set down for the<br />
first week in April. Probably, all things considered, not less than 50<br />
species in certain favored seasons either reach or pass by their flower-<br />
ing time by the end of March.<br />
In arranging the above lists the order of dates has, of course, taken<br />
precedence, but where se\'eral are enumerated under one date the natural<br />
order is followed.<br />
It is scarcely necessary to suggest a caution to collectors against rely-<br />
ing upon these dates in making collections. They represent the earliest<br />
observations and not the average. In most cases an allowance of at<br />
least one week should be made for the full blooming of all the individu-<br />
als of any given species. In all cases, however, one or more individuals
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