echinate


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

echinate

[ə′kī‚nāt]
(zoology)
Having a dense covering of spines or bristles.
References in periodicals archive ?
This group plus Eremothamnus and Hoplophyllum share round, non-lophate, echinate grains.
However, the features of the pollen in the grade comprising what are thought to be the most basal branches of the tribe (Arctotidinae, Heterolepis, Hoplophyllum and Eremothamnus) suggest that plesiomorphic palynological characters for Arctotideae may be round, non-lophate and echinate pollen.
Pollen microechinate or echinate, the ectosexine with columellae very thickly disposed (compact aspect), and the endosexine clearly columellate.
Pollen tricolporate, rarely tricolpate, microechinate with small puncta to echinate, ectosexine very compact, endosexine with stout and ramified columellae.
The denticles (fimbriae) forming the echinate border were increasingly longer on cells further from the base and closer to the apex, with denticles from cells in the middle region of a scale exceeding lengths of 10 [micro]m (Fig.
guttatus are lamellate and imbricate in the basal region, and are echinate in more apical regions.
Isoetes chubutiana produces echinate microspores similar to those
5-3 width (mm) Megaspore rugulose or reticulate ornamentation pustule Megaspore small (203-372) small (185-305) diameter (um) large (384-507) large (270-456) Megaspore ridges undulating straight or sinuous Microspore echinate ND ornamentation Microspore 10-47 ND length (um) Morphological characters panchananii (a) No.
Of the 52 collections examined, 21 had echinate macroomamentation; 19, aculeate; 6, cristate; 5, psilate; and 1, laevigate (Appendix I).
3 mm wide Microspores Laevigate Sparsely to densely echinate Megaspores size 750:630-870 [micro]m 595:460-750 [micro]m Mean: range Megaspore Densely and Ruglulate to low ornamentation distinctly and sparsely reticulate; the reticulate; the muri generally as muri low, much tall or taller lower than the than the diameter diameter of the of the included included areole areole Megaspore girdle Absent Weakly differentiated to distinctly smooth
parviflora are smooth and not echinate like all other eastern Heuchera species, and the leaves in the inflorescence are viscid from an exudate secreted by gland-tipped trichomes (Wells, 1984).
Frond midribs not typically keeled on abaxial side, bluntly triangular in transection; perispores echinate A.