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A short, sharp projection on one end of a fungus spore at the point of attachment, or on the wall, of a hypha or condiophore.
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7 um, elliptical, obtuse, with prominent apiculus, hyaline to pale yellow, spore wall loses its colour in Melzer's regeant.
Relative lengths of segments: 12-11-74-53-53-; apiculus of distal flagellomere ca one sixth length of the segment (according to B.
In many species, the connective between the two thecae forms an apiculus or connective crest (Haines & Lye, 1983) (Fig.
20 in number, subcoriacous, suberect-arcuate, forming a broad funnilform rosette; sheaths broadly elliptic, 13-14 x 10-11 cm, greenish toward the apex, subdensely brown lepidote on both sides, strongly nerved with conspicuously castaneous nerves, coarsely spinose at extreme apex; blades sublinear-lanceolate, narrowed toward the base, 25-60 x 5-6 cm, sparsely and inconspicuously white-lepidote to glabrescent, green to reddish at apex and along the apical margins, with sparse and irregular darker green spots, apex acute and distinctly apiculate, apiculus 3-4 mm long, rigid, margins densely to subdensely spinose, spines subspreading, triangular, castaneous toward the apex, the basal ones ca.
3 mm long, 4-5 mm wide, wide triangular, with a small apiculus, concave, densely lepidote on both surfaces, especially abaxially, central nerve thick and forming a keel on the posterior surface and forming an apiculus ca.
Head black, dorsum with narrow transverse lines, white medio-caudad of palpi, white between antennae, white dorsad of mid-eyes, pale blue behind antennae, broader white to pale blue cephalad on collar extending behind eyes and very broadly beneath eyes onto venteo-lateral portion of palpi, caudal portion of collar black; eyes dark gray; palpi black dorsad, third segment black, short, stout, porrect; antennae black with sparse whitish scales ventrad on club, apiculus dull red-brown of 20 (holotype) and 21 (paratype) segments.
any apiculus distinguish Cycas collina within a group of acaulescent
At anthesis, the apiculus is red whereas at maturity, the spikelet and apiculus are straw-colored and awnless.
5-5 cm, not narrowed at the base, apex rounded to subacute and distinctly apiculate, apiculus 0.
1 mm wide, dark brown, obovate to elliptic-obovate, flattened-trigonous to more or less plano-convex or even slightly concavo-convex, rounded to more or less cuneate to a sessile base, rounded to the apex, with an indistinct collar and sometimes a very short apiculus, finely papillose; style branches reddish, feathery with elongate papillae.
3 cm, apex acute to rounded or obtuse and distinctly apiculate, apiculus ca.
The spikelet is awnless and straw-colored with a red apiculus.