from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Botany Splitting or opening along a circumference, with the top coming off as a lid: a circumscissile seed capsule.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Describing any seed-vessel that splits along a circumference, with the upper part coming off as a lid
from the GNU version of the Collaborative International Dictionary of English
- adj. Dehiscing or opening by a transverse fissure extending around (a capsule or pod). See Illust. of pyxidium.
from The Century Dictionary and Cyclopedia
- In botany, opening or divided by a transverse circular line: applied to a mode of dehiscence in some fruits, as in the pimpernel (Anagallis arvensis), henbane, and monkeypot, the fruit in such cases being called a pyxidium.
Cell contents uniform, dense, cell division accompanied by circumscissile debiscence of the parent cell, producing rings on the filaments.
The = pileus = is hemispherical to convex, and expanded, smooth, whitish, with a tinge of straw color, and covered with torn, thin floccose patches of the upper half of the circumscissile volva.
The = volva = is circumscissile, the margin of the bulb not being clear cut and prominent, because there is much refuse matter and soil interwoven with the lower portion of the volva.
= -- Present or absent, persistent or disappearing, whether it splits at apex or is circumscissile, or all crumbly and granular or floccose, whether the part on the pileus forms warts, and then the kind, distribution, shape, persistence, etc.
The variable condition in this one species _A. phalloides_, now splitting at the apex, now tearing up irregularly, now splitting in a definitely circumscissile manner, seems to bid defiance to any attempt to separate the species of _Amanita_ into groups based on the manner in which the volva ruptures.
Figure 58 and the small plant in Fig. 56, both from photographs of the sooty form of _Amanita phalloides_, show in a striking manner the typical condition of the circumscissile volva margining the broad saucer-like bulb as described for _Amanita mappa_.
But when the volva is thinner and of a looser texture, it splits transversely about the middle, circumscissile, and all or a large part of the upper half of the volva then clings to the cap, and is separated into patches.
In the very young plant the volva split transversely (in a circumscissile fashion) quite clearly, and the free limb is quite short and distant from the stem on the margin of the saucer-like bulb.
-- Amanita phalloides, volva circumscissile, cap scaly, limb of volva not prominent, cap dark, scales white (natural size).
-- Amanita phalloides, volva circumscissile, concave bulb margined by definite short limb of volva; upper part of volva has disappeared from cap; cap whitish, tinged with brown.]