or with colorless hairs; distal leaves simple and undivided. > 8 8 Achene wall papery, longitudinally ribbed; leaf apex broadly rounded to truncate, margins
12 KB (580 words) - 22:49, 5 November 2020
reticulate, glabrous or hairy, lateral walls usually persistent, indehiscent below with well-differentiated dorsal wall, indehiscent or partially dehiscent
11 KB (632 words) - 23:22, 5 November 2020
covered by outgrowths of proximal portion of style base or of flower tube wall as specialized nectar chamber. Fruits indehiscent, cylindric, ellipsoid,
5 KB (602 words) - 22:57, 5 November 2020
or utricles, vertical or horizontal within perianth parts, pericarp (ovary wall) adherent or nonadherent, chartaceous or papery, sometimes reticulate, mottled
14 KB (879 words) - 22:58, 5 November 2020
(tuberculate); nut with inner wall glabrate or minutely tomentulose near base and apex, abortive ovules basal, seed coats adhering to fruit wall at maturity. Cotyledons
24 KB (374 words) - 21:04, 25 November 2022
covering the adaxial wall of the sporangium, also has diagnostic value. Seven taxa in this flora have a velum covering the entire sporangium wall (see illustration
13 KB (992 words) - 21:21, 5 November 2020
pore-like wall thinnings; chlorophyllous cells triangular to trapezoidal in transverse section, more broadly exposed on convex surface, end walls not thickened
12 KB (468 words) - 22:25, 5 November 2020
surfaces as viewed in transverse section, adjacent cell walls typically smooth, but various types of cell wall projections may be clearly visible in transverse
11 KB (898 words) - 22:27, 5 November 2020
pinnately-veined; nectary present as distinct organ, as nectariferous tissue in wall of ovary or floral tube, or absent; stamens (1–)4–42[+], usually equal to
9 KB (801 words) - 23:41, 2 December 2022
compressed or obcompressed (then often winged); pappi usually 0 (cypselar wall tissues sometimes produced as pappus-like, entire or lobed to toothed wings
18 KB (990 words) - 20:56, 5 November 2020
or papillose, not pitted, sometimes with a diffuse thin spot on the outer wall; stomata numerous; operculum rostrate with a distinct beak; peristome not
6 KB (484 words) - 22:24, 5 November 2020
of inflated, thin-walled cells, superficial cells with conspicuous to faint spiral fibrils, no or strong ornamention on interior wall, and 1–6 round to
7 KB (344 words) - 22:27, 5 November 2020
Najas gracillima), 2–4-branched. Fruits dehiscing by decay of ovary wall; ovary wall extremely delicate, closely enveloping seed. Seeds fusiform to obovoid
6 KB (477 words) - 21:32, 5 November 2020
strongly flattened, 3-15 times as wide as thick, not prolonged beyond seed; wall thick, not ornamented; margin low or high narrow ridge or wing; beak much
9 KB (314 words) - 22:50, 5 November 2020
winged in M. lindleyi); seed coat cells polygonal, ± isodiametric, anticlinal walls straight. w North America, nw Mexico, South America (Argentina, Chile). Species
14 KB (669 words) - 20:14, 5 November 2020
usually linear-oblong, incrassate with radial walls thicker toward the inner tangential wall than the surface wall; stomata present and formed from single cell;
8 KB (605 words) - 22:25, 5 November 2020
enlarged, thin-walled cells; cells in outer layer aporose or with single round to elliptical wall thinning adjacent to the distal cell wall, visible only
8 KB (399 words) - 22:27, 5 November 2020
sporangium wall; megagametophytes floating on water surface with archegonia directed downward; microgametophytes remaining fixed to sporangium wall. Mostly
2 KB (162 words) - 21:24, 5 November 2020
compressed-globose, 1.2-2 times as wide as thick, not prolonged beyond seed; wall thick, smooth; margin low narrow ridge, often inconspicuous; beak much shorter
9 KB (342 words) - 22:45, 5 November 2020
to globose, 1-2 times as wide as thick, not prolonged beyond seed; achene wall thick, smooth, not ornamented (sometimes pubescent); margins low narrow ridge;
6 KB (396 words) - 22:49, 5 November 2020