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INTRODUCTION TO BOTANY, 209
Adherent, adIicBrens. Adhering to its covers. Graminese,
Umbellifersg.—This only takes place when there is a perisperm,
and in this case the true place of the hile, and consequently
the base of the seed, is frequently very difficult to
be ascertained.
% Single, unica. Only one kernel in a seed. Most
plants.
Double, duplex. Two in each seed. Eriolithus.
% Perispermed, penspermata, perispermica, alhuminosa,
endospermica. Having a perisperm. Cyperaceae, Gramineae,
Rubiaceae, Unibelliferae.
Not-perispermed, aperispermata, exalluminosa, episperm-
ica, epiperispermica. Without a perisperm. xilismaceae,
Compositse, Faba, Phaseolus.
Tuberous,' tuherosa. Composed of an uniform mass, with
several germinating points. Aroideee, Calladium.
Perisperm.
Perispermum, Albumen, Endospermum, Secundinse in-
ternse. Medulla seminis. Cellular tissue accompanying the
emhryo in the kernel, hut scarcely ever adhering to it, and
having no vascular organization ; furnishing, during germi-
nation, the first nourishment to the young plant. PI. 18,
fig. 20 e ; 22.
Central, Perispermum centro^e. Forming a mass in the
centre of the kernel, and surrounded by the embryo. Cuscuta
Europeea, Silene, Nyctaginese.
Circumferential, periphcBricitm. Surrounding the embryo,
and concealing it. Abietideae, Cupressideae.
One-sided, unilaterale. Placed on one side, and the embryo
on the other. Gramineee.
If Dry, siccum, aridum. Gramineae.
Mealy, J'arinosum. Dry, and reducible by ti'ituration
into a fine, soft powder. Triticum, Avena, Secale.
Friable, frialile. Dry, and crumbling by a slight rubbing,
Piper nigrum, Gunnera scabra.
Oily, oleagineum. Greasy to the touch, and yielding oil
by expression. Euphorbiaceae, Nyssa sylvatica.
Mucilaginous, mucilaginosum. Having, while moist, the
consistence of a gummy matter slightly wetted. Convol-
vulus.
Pellicular, membranaceous, pelliculare, memhrariaceum.
Formed of a thin flake or pellicle. Most labiatse, Prunus,
Amygdalus.
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