Difference between revisions of "Najas gracillima"
Beitrage zur Kenntniss der Gattung Najas 23. 1870.
FNA>Volume Importer |
imported>Volume Importer |
||
| (6 intermediate revisions by 2 users not shown) | |||
| Line 7: | Line 7: | ||
|year=1870 | |year=1870 | ||
}} | }} | ||
| − | |basionyms={{Treatment/ID/ | + | |special_status={{Treatment/ID/Special_status |
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
| + | |basionyms={{Treatment/ID/Basionym | ||
|name=Najas indica var. gracillima | |name=Najas indica var. gracillima | ||
|authority=A. Braun ex Engelmann | |authority=A. Braun ex Engelmann | ||
| + | |rank=variety | ||
| + | |publication_title=in A. Gray, Manual ed. | ||
| + | |publication_place=5, 681. 1867 | ||
}} | }} | ||
|synonyms= | |synonyms= | ||
| Line 27: | Line 34: | ||
|distribution=Man.;Ont.;Nfld. and Labr. (Nfld.);N.S.;Ala.;Calif.;Conn.;Del.;D.C.;Ill.;Ind.;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mo.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;R.I.;Tenn.;Vt.;Va.;Wis.;Eurasia. | |distribution=Man.;Ont.;Nfld. and Labr. (Nfld.);N.S.;Ala.;Calif.;Conn.;Del.;D.C.;Ill.;Ind.;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mo.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;R.I.;Tenn.;Vt.;Va.;Wis.;Eurasia. | ||
|discussion=<p>No specimens were seen from in Alberta, Manitoba, or Quebec, but the species is to be expected there.</p><!-- | |discussion=<p>No specimens were seen from in Alberta, Manitoba, or Quebec, but the species is to be expected there.</p><!-- | ||
| − | --><p>Najas gracillima is most similar to N. minor, especially in vegetative condition. Najas gracillima, however, can be separated from the latter species by its style arising off-center at the apex of the ovary wall and by its aeroleareoles being longer than broad. Late in the growing season, the leaves of N. minor become recurved; those of N. gracillima do not.</p> | + | --><p><i>Najas gracillima</i> is most similar to <i>N. minor</i>, especially in vegetative condition. <i>Najas gracillima</i>, however, can be separated from the latter species by its style arising off-center at the apex of the ovary wall and by its aeroleareoles being longer than broad. Late in the growing season, the leaves of <i>N. minor</i> become recurved; those of <i>N. gracillima</i> do not.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 36: | Line 43: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Najas gracillima | name=Najas gracillima | ||
| − | |||
|authority=(A. Braun ex Engelmann) Magnus | |authority=(A. Braun ex Engelmann) Magnus | ||
|rank=species | |rank=species | ||
| Line 50: | Line 56: | ||
|publication title=Beitrage zur Kenntniss der Gattung Najas | |publication title=Beitrage zur Kenntniss der Gattung Najas | ||
|publication year=1870 | |publication year=1870 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V22/V22_215.xml |
|genus=Najas | |genus=Najas | ||
|species=Najas gracillima | |species=Najas gracillima | ||
Latest revision as of 20:30, 5 November 2020
Stems slightly branched distally, 4.5–48 cm × 0.2–0.7 mm; internodes 0.1–3.2 cm, without prickles. Leaves spreading to ascending with age, 0.6–2.8 cm, lax in age; sheath 0.5–1.5 mm wide, apex truncate; blade 0.1–0.5 mm wide, margins minutely serrulate, teeth 13–17 per side, apex acute with 2–3 teeth, teeth unicellular; midvein without prickles abaxially. Flowers 1–3 per axil, staminate and pistillate on same plants. Staminate flowers in distal axils, 1.5–2 mm; involucral beaks 2-lobed, 0.8 mm; anthers 1-loculed, 1.3 mm. Pistillate flowers distal to proximal on plant, 0.5–2.7 mm; styles 0.3–1.5 mm; stigmas 2-lobed. Seeds not recurved, light brown, fusiform, 2–3.2 × 0.4–0.7 mm, apex with style situated offat center; testa dull, 3 cell layers thick, pitted; aeroleareoles regularly arranged in 40 longitudinal rows, not ladderlike, 4-angled, longer than broad, end walls raised. 2n = 24, 36.
Phenology: Flowering summer–fall.
Habitat: Soft water lakes
Elevation: 0–200 m
Distribution
Man., Ont., Nfld. and Labr. (Nfld.), N.S., Ala., Calif., Conn., Del., D.C., Ill., Ind., Ky., Maine, Md., Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Tenn., Vt., Va., Wis., Eurasia.
Discussion
No specimens were seen from in Alberta, Manitoba, or Quebec, but the species is to be expected there.
Najas gracillima is most similar to N. minor, especially in vegetative condition. Najas gracillima, however, can be separated from the latter species by its style arising off-center at the apex of the ovary wall and by its aeroleareoles being longer than broad. Late in the growing season, the leaves of N. minor become recurved; those of N. gracillima do not.
Selected References
None.