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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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Antennae dark brown with the apiculus pointed and hooked, red brown ventrally.
Relative lengths of antennomeres: 11-10-64-45-44-44-44-43-39-37-35-33-32-28-23-22; apiculus of distal flagellomere ca 0.
Relative lengths of segments: 12-11-74-53-53-; apiculus of distal flagellomere ca one sixth length of the segment (according to B.
Stamens included; filaments complanate, lilac toward the apex, the antepetalous ones adnate to the petals for 6-8 mm, the antesepalous ones free; anther base obtuse-sagittate, apex apiculate, apiculus nigrescent, dorsifixed above the base at 1/3 of its length; pollen globose, diporate, exine psillate; stigma conduplicate-spiral, ellipsoid-capitate, lilac-purple, margins crenulate-lacerate; ovary obconic, trigonous, 8-9 mm long, 6-7 mm in diameter at the apex, white, glabrous, bearing inconspicuous longitudinal sulcus; placentation apical; ovules shortly caudate; epigynous tube inconspicuous, ca.
Jochen Bockemuhl breaks down the developmental process into four discrete activities: 1) "'shooting,' when the leaf's apiculus extends away from the growing point"; 2) "articulating," when the tip "begins to move in several different directions"; 3) "spreading," when "the points of articulation begin to move away from each other"; and 4) "stemming," when "the stalk at the base of the leaf extends itself.
Meanwhile, an apiculus is formed on the top of each anther (Figs.
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.
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
5-5 cm, not narrowed at the base, apex rounded to subacute and distinctly apiculate, apiculus 0.
3 cm, apex acute to rounded or obtuse and distinctly apiculate, apiculus ca.