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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.
Farlex Partner Medical Dictionary © Farlex 2012
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Basidiospores 7.5-12.5 x 4-5.7 um, elliptical, obtuse, with prominent apiculus, hyaline to pale yellow, spore wall loses its colour in Melzer's regeant.
This species is characterized by being yellowish white to pale orange basidiocarp, cylindrical to subcylindrical, tibiform or capitate cystidia and ellipsoid to subcylindrical, somewhat tapering towards the apiculus, sometimes slightly concave at the adaxial side, thin-walled basidiospores.
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.
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.
Leaves 17 to 20 in number, densely rosulate, suberect, forming a funnelform rosette; sheaths ovate-elliptic, 13-18 x 10 cm, densely and minutely brown-lepidote on both sides, thinly coriaceous, dark castaneous on both side and mainly abaxially, except for the green and purple spotted apex, blades sublinear, slightly narrowed toward the apex, 25-30 x 4.5-5 cm, not narrowed at the base, apex rounded to subacute and distinctly apiculate, apiculus 0.7-0.8 cm long, green to glaucous and prevailingly purple to wine-spotted mainly toward the base, with inconspicuous darker green irregular cross-veins by transmitted light, chartaceous, sparsely and inconspicuously white-lepidote and covered on both sides by a thin layer of white wax, margins revolute at the apex.
Achene 1.3-1.6 mm long, 0.9-1.1 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.
At maturity, the spikelet and apiculus are tawny-colored and awnless.
Leaves 10 to 14, suberect-recurved, forming a funnelform rosette, the outer ones narrowed and inconspicuously dimorphic mainly in young specimens; sheaths elliptic to ovate-elliptic, 10-13 x 5.5-7.5 cm, subdensely pale-brown lepidote on both sides, dark wine-purple inside and toward the apex, green with irregular purple spots; blades linear, inconspicuous if at all narrowed toward the base, inconspicuously and sparsely white lepidote on both sides, green except for the semicircular red spot at the apex, margins subdensely to densely spinulose, spines 1-2 mm long, 3-7 mm apart, castaneous, the outer blades 22-30 x 1.5-2.5 cm, apex acuminate, the inner ones 14-20 x 4.7-5.3 cm, apex acute to rounded or obtuse and distinctly apiculate, apiculus ca.
The spikelet is awnless and straw-colored with a red apiculus. The stigma is light purple.