The plants have a short rhizome and narrow or lanceolate basal leaves; and they are characterized by the ovary being often half-inferior.
The plants generally have a rhizome bearing radical leaves, as in asphodel, rarely a stem with a tuft of leaves as in Aloe, very rarely a tuber (Eriospermum) or bulb (Bowiea).
These are ferns of considerable size, the large leaves of which are borne on a short, erect, swollen stem (Angiopteris, Marattia), or arise from a more or less horizontal rhizome (Danaea, Kaulfussia).
Podophyllin is a resinous powder obtained by precipitating an alcoholic tincture of the rhizome by means of water acidulated with hydrochloric acid.
As the aerial stem is traced down into the underground rhizome portion, these three mantles die out almost entirelythe central hydrom strand forming the bulk of the cylinder and its elements becoming mixed with thick-walled stereids; at the same time this central hydromstereom strand becomes three-lobed, with deep furrows between the lobes in which the few remaining leptoids run, separated from the central mass by a few starchy cells, the remains of the amylom sheath.
PODOPHYLLIN, a drug obtained from the rhizome of the American mandrake or may apple, Podophyllum peltatum, an herbaceous perennial belonging to the natural order Berberidaceae, indigenous in woods in Canada and the United States.
Of the body is the acquirement of true roots, the nearest approach to which in the lower forms we saw in the rhizome of Polytrichaceae.
In Dawsonia superba, a large New Zealand moss, the hydroids of the central cylinder of the aerial stem are mixed with thick-walled stereids forming a hydrom-stereom strand somewhat like that of the rhizome in other Polytrichaceae.
The plants have a rhizome or corm, and the fruit is a capsule.
The rhizome of Acorus Calamus is sometimes adulterated with that of Iris Pseudacorus, which, however, is distinguishable by its lack of odour, a stringent taste and dark colour.