. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. 405 464 463 587, The POSITION OF the seed in the pericarp is, like that of the ovule, erect, asce-dding, pendulotis, etc (§ 534). Likewise in respect to its inversions, it is orChd- tropous, andtropous, amphiiropous, and campylotropcmx (§ 536), terms already defined. The anitropous is by far the most common condition. 588. The hilum is the scar or mark left in the testa of the seed by its separation from the funicukis. It is
. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. 405 464 463 587, The POSITION OF the seed in the pericarp is, like that of the ovule, erect, asce-dding, pendulotis, etc (§ 534). Likewise in respect to its inversions, it is orChd- tropous, andtropous, amphiiropous, and campylotropcmx (§ 536), terms already defined. The anitropous is by far the most common condition. 588. The hilum is the scar or mark left in the testa of the seed by its separation from the funicukis. It is com- monly called the eye, as in the bean. In ortho- tropous and cauipylo- tropous seeds, the hilinn corresponds with the chalaza (§535). In other conditions it does not, 401 460 463 and the raphe (§537) ex- 460, Aril ofEuonymus. 461, Aiil of Nutmeg (mace). 462, ^yu^Jg between the two Seed of PolyL^a!;!, cuibi-yo, cai-imcle, c, (too small.) 463, Seed . ofOatiilpa. 464, Seed of "Willow. 465, Seed of Cotton. points, as in the Ovules. 589. The seed kernel may consist of two parts, the embryo and albumen, or of the embryo only. In the former case the seeds are albuminous, in the latter, exalbuminous, a distinction of great import- ance in systematic botany. 590. The albumes is a starchy or farinaceous substance accom- panying the embryo and serving as its first nourishment in germina- tion. Its qualities are wholesome and nutritious, even in poisonous plants. Its quantity when compared with the embryo varies in cverv possible degree; being excessive (Ranunculacese), or about equal (Vio- laccie), or scanty (ConvolvulaocEe), or none at all (Leguminoste). In texture it is mealy in wheat, mucilaginous in mallows, oily in Ricinus, horny in coffee, ruminated in nutmeg and pawpaw, ivory-like in the ivory-palm (Pliytclephas), fibrous in cocoa-nut, whore it is also hollow, enclosing the milk. 591. The embryo is an organized body, the rudiment of the future plant, consisting of roo
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