210 NATURAL HISTORY OF SELBORNE. 
we cannot but admire. I shall only instance at present in tlie 
crocus sativuSy tlie vernal, and the autumnal crocus, which have 
such an affinity, that the best botanists only make them varieties 
©f the same genus, of which there is only one species 5 not being 
able to discern any difference in the corolla, or in the internal 
structure.* Yet the vernal crocus expands its flowers by the 
beginning of March at furthest, and often in very rigorous wea- 
ther ; and cannot be retarded but by some violence offered : — 
while the autumnal (the saffron) defies the influence of the spring 
and summer, and will not blow till most plants begin to fade and 
run to seed. This circumstance is one of the wonders of the 
creation, little noticed, because a common occurrence : yet ought 
not to be overlooked on account of its being familiar, since it 
would be as difficult to be explained as the most stupendous phe- 
nomenon in nature. 
Say, what impels, amidst surrounding snow 
Congeal'd, the crocus' flamy bud to glow ? 
Say, what retards, amidst the summer's blaze, 
Th' autumnal bulb, till pale, declining days ? 
The God of Seasons, whose pervading power 
Controls the sun, or sheds the fleecy shower. 
He bids each flower his quick'ning word obey ; 
Or to each lingering bloom enjoins delay. 
* The croais vermis and C. sativus are now, I believe, universally acknowledged as distinct spe- 
cies, of which few botanists entertain a doubt. Almost as familiar an instance may be cited 
in the ulex mil<raris and U. nana, two allied species of furze, both of which are very abundant on 
the heaths around London : the former of them flowering chiefly in April and May, the latter 
never until the autumn. Plants in general are not much subject to variation in wild nature, but 
some remarkable exceptions obtain in the one genus primula. The wild auricula, for example, 
assumes two very diflferent aspects in its indigenous localities, which have usually been accepted 
as distinct species ; but a more extraordinarj^ variety occurs in the common primula vids^aris, it 
having been ascertained that the primrose, the cowslip, and the oxlip, together with all the nu- 
merous cultivated polyanthuses, are simply varieties of the same original stock. In addition to 
the proofs adduced of this startling fact by Professor Henslow and the Hon. and Rev. W. Herbert, 
I may mention that, a season or two ago, being much struck with the beautiful appearance of a 
bank of various coloured primroses, in front of tl»e porter's lodge, at Beddington Park, in Surrey, 
1 was informed by the inmate of the lodge that they had all been raised from the carefully col- 
lected seed of some very choice polyanthuses, which he showed me in his back garden, and which 
had been sown in the hope and expectation of raising some good plants, of the kmd last men 
tioned. Indeed, it is not very unusual for cultivated polyanthuses to throw forth a few flowers 
from the root, in addition to those borne on a general stem ; and there is a common variety 
with flowers of the trne primrose colour and character, growing, as in the ordinary polyan 
thus««j upon a raised stalk. — Ed. 
