pistillode การใช้
- The exine is tectate and reticulate; pistillodes are not present.
- The pollen is disculate and elliptic with tectate exine; pistillode minute.
- The pistillode, when present, is small, ovoid and three lobed.
- The pollen is circular to elliptical and monosulcate; exine reticulate and tectate and irregularly spotted with striate spines; the tiny pistillode is trifid.
- The two flower morphs are however difficult to observe as they are rather morphologically similar; male flowers have a pistillode with the ovaries empty and female flowers have empty, smaller anthers ( staminodes ).
- Based on hair, leaf and flower morphology, Myriocarpa could equally well be placed in the Lecantheae ( absence of hooked hairs ) or the Urticeae ( alternate leaves, pistillodes not ejecting the achene ) and further research, both molecular and morphological, is warranted.
- ""'Furtadoa " "'is a genus of flowering plants in the Araceae spadix is unique by having the male flowers ( except for those at the tip of the spadix ) each associated with a sterile female flower ( a pistillode ) in addition to each fertile female flower being associated with a sterile male flower ( staminode ).
- DNA sequences suggest that " Carpinus " might have differentiated from the extinct genus " Palaeocarpinus " . " Carpinus " is defined by several morphological characters including presence of pistillodes in the male florets, and leafy bracts subtending the flowers and fruits . " Carpinus " is divided into two sections, " Distegocarpus " and " Carpinus ", based on floral bracts, infructescences, and scales.
- Interfoliar, branched to 2 ( 3 in a few cases ) orders, with the basal part within the closed sheath, the prophyll hidden and the peduncular bract spreading from the top of the sheath; peduncle 68 123 cm . long, distally 9 x 5 cm . in diam ., green, glabrous, curved outside the sheath; prophyll c . 91 cm ., borne at 32 cm . above the base of the peduncle, 11.5 cm . wide, narrowly 2-winged; peduncular bract deciduous, about 80 cm ., beaked ( about 5 cm . ) and closed distally, pale waxy grey, inserted about 48 cm . from the base of the peduncle; open peduncular bract 14 x 7 cm .; rachis 84 102 cm ., with 23-24 branched and 14-17 unbranched first order branches, in a few cases some of the proximal branches branched twice more, but not more than 3 in the entire inflorescence; all axes green with white bloom; first order branches proximally 2-3 x 0.5 1 cm .; rachillae 14 32 cm ., 3 4 mm . in diam ., with flattish base and distant to rather dense triads, hardly sunken in slight pits with entire, obtuse or acute bracts . "'Staminate flowers "'with sepals 2.2-2.5 x 1.6-2.2 mm ., keeled, gibbous at the base, broadly ovate, obtuse, the margins membranous; petals connate for 0.2-0.5 mm ., the free lobes 2.8-3 x 2.8-3.2 mm ., ovate or elliptic, acute, sometimes with hooded apex; stamens 6, uniseriate, the filaments connate for 0.2-0.5 mm ., 2.8-3.2 mm . long, anthers 2.1-2.3 x 1 mm .; pistillode 2.2-2.3 mm ., columnar, 0.8 1 mm . in diam.