crenate


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Related to crenate: crenate leaf

crenate

[′krē‚nāt]
(biology)
Having a scalloped margin; used specifically for foliar structures, shrunken erythrocytes, and shells of certain mollusks.
References in periodicals archive ?
some species of the subgenus Milligania, with its ovate, crenate,
with a truncate-cordate base, acute apex, and crenate margin, has
bryopteris) are tougher, thin and light colored, generally with more than one lobe of which the tip margins are crenate with many glandular cells (Fig.
Leaves deeply crenate as far as the base and subamplexicaul, with an oblong to subtriangular lamina (broader at the base), separate the African T.
2 cm, 6-14 pairs per lamina, oblong-ovate to deltate, incised 2/3 or less to the costae, bases truncate or round, apices acuminate, margins crenate to slightly serrate, without differentiated marginal cells; costae grooved adaxially, with vertical laminar wings 0.
Perisopre reticulate; lateral pinnae subentire or crenate, apex obtuse or acute 3.
of pinna pairs 20-40 Length of lowest 4-7 pinnae (cm) Length of largest 12-15 pinnae (cm) Hairs on rachis Present (adaxial face) Hairs on costa Present (abaxil face) Pinnule margins Slightly crenate to subentire Veins Forked, 10-11 pairs per pinnule Major characters C.
7 cm, oblong-attenuate, stalked 2-5 mm, lightly oblique, with a terminal conform, biggest pinnule; pinnules alternate, oblique, articulate, stalked 13 mm, the black color of the stalk suddenly stopping at the pinnule base, leaving a discoid black joint when it falls off, the sterile ones larger, the base cuneate, distally rounded or with the apex and lobules blunt, the outer margins crenate and dentate to lobulate, the fertile ones contracted, saggitate, the apex and lobules acute, lobulate, dentate toward the lobules apex; pinnules of the first order 2-7 pairs, 0.
Fertile fronds to 80 cm long; lamina to 30 cm long, pentagonal, pedate to usually deeply 5-lobed, with 3-5 pairs of pinnae/segments, slightly ascending; apices acute to acuminate; sterile tips conspicuous, up to 1 cm long, with crenate to serrate margin; basal pinnae/segments pinnatifid to deeply pinnatilobed, asymmetric, the basiscopic side being more developed and more dissected than the acroscopic side, broadly surcurrent; distal pinnae/segments predominantly lanceolate, rarely lobed, broadly sursumcurrent; inter-pinnae sinus inconspicuous to broad, rounded; apex of the lamina long-acuminate, tapering.
0 mm, (7)10-14(20) pairs, linear, ascending, the bases adnate, the apices rounded to acute, the pinna margins crenate or minutely notched on smaller pinnae, the basal pinnae sometimes with a basal constriction caused by the acroscopic and basiscopic margins folding toward the abaxial side, the acroscopic margin provided with a dark sunken nectary, at least on basal pinnae; adaxial lamina surfaces glabrous, hydathodes present, sunken, not white-encrusted; abaxial lamina surfaces densely scaly, the scales 0.