632 ICOSANDRIA. POLYGYNIA. Potentilla. 
Borrer, not decidedly “ smooth and even/’ as in Fragaria; but rather 
c< transversely wrinkled or rugose/’ as in Potentilla. Gmelin esteems it 
a Comarum, and calls it C. Fragarioides. Roth also thinks it should be 
referred to the genus Comarum, as having no berry-like, deciduous re¬ 
ceptacle, but one that is dry, spongy, and permanent. We must, how¬ 
ever, agree with the writer of the Botanical Report, Month. Mag. v. 24, 
that the succulent or dry state of the receptacle, even combined with a 
slight variation in the surface of the seed, does not seem sufficient to 
divide the genus. In a case of difficulty the habit should always have 
great weight, and in this respect it is altogether a Fragaria. E.) 
Barren Strawberry. (Welsh: Coeg-fefusen. F. sterilis. Linn. Lightf. 
Huds. With. Curt. Sm. FI. Brit, and E. Bot. Ray. Bauh. Willd. Hoffm. 
Oed. Potentilla Fragariastrum. Ehrh. Sm. Eng. FI. P. fragaria. De 
Cand. Hook. Grev. P. fragarioides. Villars. E.) Barren pastures, 
heaths, and hedge banks. P. April—May.* 
POTENTIL'LA.f Calyx ten-cleft: Petals five : Seeds round- 
ish, naked, wrinkled, attached to a small, juiceless, 
spongy, tubercled receptacle. 
(1) Leaves pinnate. 
P. frutico'sa. Leaves winged, entire, hairy: stem shrubby. 
Dicks. H. S. — E. Bot. 88— Kniph. 5— Wale. — H. Ox. ii. 23. row 3. f. 3d. — 
R. Cat. Ed. ii. at p. 228— Pet. 41. 8— Amman. 17 and 18. 1. 
{Stem upright, tinged with red, much branched, three feet high. E.) 
Whole plant set with fine silvery hairs. Leafits about an inch long, 
strap-spear-shaped, turned back at the edges, dark green above, pale 
underneath. Leaves hardly to be called winged, consisting of two pairs 
set crosswise, rising from the same point, with a terminal one divided 
down to the base into three open segments. Blossom yellow. 
Shrubby Cinquefoil. On the south bank of the Tees below Thorpe, and 
Egleston Abbey; and also near Greta Bridge, and Mickle-Force, Tees- 
* (Both species of Fragaria , (from whence originate the numerous cultivated sorts), are 
subject to Uredo Fragaria, “ in roundish dots, on the underside the leaves ; bright yellow, 
changing to dark brown.”—Besides the discolouration on either surface of the leaves, princi¬ 
pally occasioned by fungi or insects, spots are often apparent, generally of a dark hue, 
and not unfrequently observable on different kinds of Strawberry plants, for which no such 
origin can be detected. A probable cause of these appearances was many years ago 
suggested to me by my late very ingenious and learned friend Professor Robison ; who 
conjectured that they were in most instances produced by the power of the sun acting upon 
a globular drop of dew, or perhaps sometimes of rain, as through a burning lens, the rays 
becoming thus so concentrated as to incinerate, more or less, the portion affected. In a 
recent publication (Journ. Nat.) we observe something like the same hypothesis pro¬ 
pounded.—Dr. Mason Good, in his “Book of Nature,” remarks, “Amonganimals some are 
locomotive or migratory, andothers stationary or permanent, (including the zoophite order), 
though the greater number may be migratory. Plants are, on the contrary, for the most 
part stationary, yet many are fairly entitled to be regaided as locomotive or migratory, 
of which the genus Fragaria affords examples; as do the palmate, the testicular, and the 
premorse rooted tribes, offer similar proofs. Many of these grow from a new bulb or knob, 
or radicle, while the old root dies away; we may therefore conclude that the vital principle 
of the plant has quitted an old dilapidated, and ruinous mansion, to take possession of a new 
one.” And thus several of the Orchidia;, or Scabiosa succisa , may sometimes be traced in 
their change of position across half an acre. E.) 
f (Diminutive of potentia , power or efficacy; from its supposed medicinal virtues. E.) 
