or mammillose, walls often incrassate. Specialized asexual reproduction occasional, by gemmae. Sexual condition usually gonioautoicous or dioicous, rarely
14 KB (382 words) - 07:42, 30 July 2020
or brownish. Stems irregularly branched; paraphyllia absent; rhizoids occasional on stem. Stem and branch leaves similar. Stem-leaves crowded, imbricate
8 KB (515 words) - 07:45, 30 July 2020
shortrectangular to elongate, walls firm. Specialized asexual reproduction occasional, as multicellular filamentous gemmae borne in axils or along stems, or
12 KB (480 words) - 06:59, 30 July 2020
asexual reproduction by gemmae occasional, usually spheric to elliptic, of 1–10 cells, usually borne in leaf-axils, occasionally on adaxial surface of costa
28 KB (1,343 words) - 07:04, 30 July 2020
fruit wall after ripening. 2n = 40, 42 (G), 50, 80. Phenology: Flowering (occasional) summer. Habitat: Mesotrophic to –eutrophic, quiet waters, in continental
6 KB (471 words) - 00:57, 30 July 2020
1-3-pinnately dissected, segments narrowly linear, margins entire or with occasional tooth. Inflorescences terminal, flowers solitary; bracts absent. Flowers
8 KB (464 words) - 08:44, 30 July 2020
within fruit wall after ripening. 2n = 40, 42, 50. Phenology: Flowering (occasional) spring–fall. Habitat: Mesotrophic to –eutrophic, quiet waters, in temperate
5 KB (409 words) - 00:53, 30 July 2020
ascending, sometimes prostrate or decumbent for much of their length, occasionally climbing, rarely floating; nodes prominent, sometimes concealed by the
35 KB (1,876 words) - 02:36, 30 July 2020
monoicous, occasionally rhizautoicous; perigonia and perichaetia terminal or occasionally lateral on short branchlets. Perigoniate plants occasionally smaller
28 KB (882 words) - 07:00, 30 July 2020
and slightly expanded tips; rachis with scattered glandular-hairs and occasional hairlike scales. Pinnae ovate-deltate to elliptic, longer than wide, abruptly
8 KB (642 words) - 00:24, 30 July 2020
Leaves 3–4, 30–85 cm; blade unkeeled, glaucous. Scape self-supporting, with occasional bends, 20 (rarely –90) cm, scabrous. Inflorescences umbellate, dense,
7 KB (499 words) - 06:02, 30 July 2020
strand present; outer pseudoparaphyllia narrow, triangular to lanceolate, occasional one broadly triangular; rhizoids or rhizoid initials at various points
8 KB (508 words) - 07:46, 30 July 2020
Capsules ellipsoid, to 1.6 cm. Seeds black, shining, smooth. 2n = 12 (plus occasional supernumerary chromosomes). Phenology: Flowering early–late spring. Habitat:
7 KB (506 words) - 08:31, 30 July 2020
spring–early summer, sometimes later following unseasonable rainfall. Habitat: Occasional in dry, rocky, limestone soils in chaparrals, usually growing under scrubby
5 KB (535 words) - 06:04, 30 July 2020
in mature portion narrowly triangular, 2–3.5 mm; margins entire or with occasional papillae; stomates present on both surfaces, numerous (35–60 per 1/2 leaf)
5 KB (461 words) - 00:29, 30 July 2020
papillae on both surfaces. Specialized asexual reproduction at the stem apex occasional, by deciduous or fragile propaguloid leaf tips, or by deterioration of
21 KB (1,511 words) - 07:02, 30 July 2020
leaves: blade oblanceolate, 1–2 cm (width 4–8 mm), margins entire or with occasional tooth, (apex acute). Racemes congested, (elongated in fruit, greatly exceeding
7 KB (786 words) - 11:55, 30 July 2020
abaxial surface, elliptic to short-linear, of 4–10 cells, 1-seriate or with occasional 2-seriate portions, smooth. Sexual condition autoicous; pergonial leaves
9 KB (525 words) - 06:56, 30 July 2020
oblong-lanceolate, 5–20 mm, leathery to herbaceous, glabrous except for occasional hairlike scales abaxially near midrib; margins recurved on fertile segments
8 KB (585 words) - 00:35, 30 July 2020
embryo peripheral, curved. x = 17, 12 (Eurasia), 18 (Eurasia); aneuploidy occasional. Introduced; temperate Eurasia, Africa, Pacific Islands, Australia, in
13 KB (910 words) - 10:22, 30 July 2020