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Botrychium obliquum, M u h le n b e r g , I. c . — B . lunarioides, var. obliquum,
G r a y , 1. c .— B . ternatum, C ) Americanum, |3. obliquum, M i ld e ,
Botr. Mon. p. 163.
Var. dissectum : — Plant usually ample ; sterile segment decompound ;
secondary or tertiary divisions ovate-lanceolate, pointed, cut into innumerable
very narrow ultimate segments or teeth, which receive solitary veinlets.
Botrychium dissectum, S p r e n g e l , 1. c . ; M u h l en b e r g , 1. c. — B . lunarioides,
var. dissectum. G r a y , 1. c. — B . ternatum, C ) Americanum, y. dissectum,
M il d e , Botr. Monogr., p. 164.
H ab. — In pastures and on hillsides, sometimes in woods also, from
Newfoundland to Unalaska in the North, and extending southward to
Florida and California. Also found, in one form or another, in Northern
and Central Europe, Northern Asia, Japan, the Hawaiian Islands, New
Zealand, Australia, and from Mexico to New Granada and Venezuela.
D e s c r i p t i o n . — The ternate grape-fern presents greater differences
in size, and wider variations in the form and cutting of
the divisions of the sterile segment, than any other species of
the genus. The plant varies from barely one inch to nearly a
foot and a half in height, though it but rarely touches either
of these extremes.
The root-stock is cord-like, a few lines or an inch or two in
length, bearing fascicled roots chiefly just below the terminal
bud. The roots are dark-colored, sparingly branched, fleshy, and
full of starch-granules. Very often they have a knotted or
densely annulate appearance. As the axis of growth elongates
from year to year by the development of new fronds, new roots
arc formed, and some of the older ones perish, though others of
them remain apparently for several years.
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