cuneate


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cuneate

[′kyü·nē‚āt]
(biology)
Wedge-shaped with the acute angle near the base, as in certain insect wings and the leaves of various plants.
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LEAF DESCRIPTION: SIMPLE, 1 1/2" to 2" long and half as wide, ovate shape with cuneate base and entire margins.
0.7 cm, pubescent, leaflets 3.5-6.5 (-8) x 2-4(-4.5) cm, discolorous, chartaceous, lanceolate or ovate, apex acute and obtuse, margins entire or serrated in young leaflets, base rounded to subcordate or cuneate in young leaflets, venation penninerved, adaxial surface slightly pubescent, abaxial surface tomentose, both with tector trichomes.
Hypotheca is cuneate in its posterior portion, with a markedly attenuated antapex tilted toward the ventral part of the cell, dorsally convex, narrowly rounded at the antapex, and strongly concave between the antapex and LSL.
Terrestrial or epiphytic; rhizomes 3-6 mm diam., short to long-creeping, dorsiventral; rhizome scales 3-10 x 1-2 mm, ovate to linear-lanceolate, orange-yellowish with blackish central zone, light, dull, dense, margins entire; phyllopodia distinct, 10-35 mm long; fronds 20-46 (-62) cm long, spaced 0.3-1.0 cm apart; stipes (1/5) 1/3-1/2 of the frond length; basal stipe scales 3-5 mm long, gradually reduced to 1 mm near to apex of stipe, yellow-orange to blackish, with small irregular teeth; blades 15-26 (-38) x (3-) 4.5-7 cm, elliptic to lanceolate, coriaceous, base cuneate to obtuse, apex acute to acuminate; blade scales sparse, minute, stellate with blackish central body; basal costal scales to 1 mm; veins obscure to evident, free, simple to 2-forked, ca.
LEAF DESCRIPTION: COMPOUND (Palmately), 5 to 7 leaflets, narrow obovate leaflets, 4" to 8" long, acute to cuspidate tips, acute to cuneate bases.
The species is easily recognizable by its petiolate leaves, semi-crassous with base cuneate, and by inflorescences in pseudo-racemes of dyads or triads with reddish corollas.
Leaves Leaves oblanceolate, Leaves broadly obovate, 30 x 5060 mm long, 30 x 50 mm long, narrowly acute to rounded to broadly acuminate at base, cuneate at base, mostly glabrous, sparsely short-villous slightly hairy above, densely villous beneath, mostly below but becoming along veins.
LEAF DESCRIPTION: SIMPLE, 2" to 4" long and half as wide, elliptic shape with cuneate base and acuminate apex, serrated margins.
Leaves spirally arranged; petiole 1-5(-8) mm long, green; proximal and distal blades of the same shape and size, obovate, 4-9(-10.5) x 2-4.8 cm, fleshy to slightly coriaceous, the base symmetric, cuneate, the apex convex to rounded, the margin revolute, subentire to slightly serrulate, with 8-14 teeth on each side, teeth in one-size class, each tooth with a distal callosity, the adaxial surface lustrous green, glabrous, the abaxial surface pale green, sparsely pubescent, the venation brochidodromous, with five to seven pairs of secondary veins, irregular spaced, excurrent to mid-vein, higher order veins reticulated, submarginal vein present but irregular.
Achene 1.6-2.1 mm long, 1.1-1.5 mm wide, dark brown, ellipsoid to broadly obovoid, flattened-trigonous to more or less planoconvex, the adaxial face slightly concave, more or less cuneate to a sessile base, rounded to the short apiculate apex (the style base persistent as an apiculus 0.1-0.2 mm long, or up to 0.4 mm long but easily broken), finely papillose; style branches stramineous to pale reddish, feathery with elongate papillae.
3/5 of the frond length; fertile blade 4 x 0.9 cm, elliptic, basically cuneate, apically obtuse; costal scales 1-2 mm diam., ovate to skeletonized, marginally long ciliate; intersporangial scales absent.
Thyopsiella) is characterized by the small plant size (width less than 1 mm), the rounded leaf apex and the small, distant underleaves which are hardly wider than the stem, deeply bifid (to 1/2), cuneate at the base and with flat margins.