guttatus are lamellate and imbricate in the basal region, and are echinate in more apical regions.
The lamellate imbricate basal and echinate apical scale microornamentation pattern of Pantherophis guttatus, P.
Marticorena (1963) described for the pollen grains of the genera of Sicyineae "echinate or echinulate exine, covered by an apparently loose coat, formed by baculoid processes, which in some species, have a loosely reticuloid disposition".
As demonstrated in several pollen studies (Marticorena, 1963; Stafford & Sutton, 1994; Rodriguez-Jimenez & Palacios Chavez, 1998; Lira et al., 1997a) and in this work, species of Cyclantherinae do not have an echinate exine.
95-100) (Telleria et al., 2003; Telleria & Katinas, 2004): exine scabrate, microechinate or echinate with short spines (usually less than 2 [micro]m), tectum imperforate or scarcely perforate.
95-100): exine echinate, with long spines (4-5 [micro]m length), spines usually with compact tip, tectum very perforate.
Arctotideae pollen may be psilate or echinate, with spines of varying number and size but always having perforations towards the base.
They are nonlophate and echinate, the spines many, dense, conical with a long tapering point, up to 8 [micro]m long, the bases slightly swollen.
hieronymii have echinate ornamentation similar to that
Isoetes chubutiana produces echinate microspores similar to those
Of the 52 collections examined, 21 had echinate
macroomamentation; 19, aculeate; 6, cristate; 5, psilate; and 1, laevigate (Appendix I).
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).