circumscissile

Cell contents uniform, dense, cell division accompanied by circumscissile debiscence of the parent cell, producing rings on the filaments.

Scientific American Supplement, No. 384, May 12, 1883 Various

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.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886

-- Amanita phalloides, volva circumscissile, cap scaly, limb of volva not prominent, cap dark, scales white (natural size).

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886

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.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886

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.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886

= -- 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.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886

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_.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886

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.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886

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.

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886

-- 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.]

Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. George Francis Atkinson 1886