Difference between revisions of "Echinodorus tenellus"

(Martius) Buchenau

Index Crit. Butom. Alism. Juncagin. 21. 1868.

Basionym: Alisma tenellum Martius
Synonyms: Echinodorus parvulus Engelmann Echinodorus tenellus var. parvulus (Engelmann) Fassett Helianthium parvulum unknown
Treatment appears in FNA Volume 22.
FNA>Volume Importer
 
FNA>Volume Importer
Line 14: Line 14:
 
|name=Echinodorus parvulus
 
|name=Echinodorus parvulus
 
|authority=Engelmann
 
|authority=Engelmann
}}{{Treatment/ID/Synonym
+
}} {{Treatment/ID/Synonym
 
|name=Echinodorus tenellus var. parvulus
 
|name=Echinodorus tenellus var. parvulus
 
|authority=(Engelmann) Fassett
 
|authority=(Engelmann) Fassett
}}{{Treatment/ID/Synonym
+
}} {{Treatment/ID/Synonym
 
|name=Helianthium parvulum
 
|name=Helianthium parvulum
 
|authority=unknown
 
|authority=unknown
Line 35: Line 35:
 
|elevation=0–1500 m
 
|elevation=0–1500 m
 
|distribution=Ala.;Conn.;Fla.;Ga.;Ill.;Kans.;Mass.;Mich.;N.Y.;S.C.;Tex.;Vt.;se Mexico;West Indies;Central America (Guatemala;Nicaragua);South America.
 
|distribution=Ala.;Conn.;Fla.;Ga.;Ill.;Kans.;Mass.;Mich.;N.Y.;S.C.;Tex.;Vt.;se Mexico;West Indies;Central America (Guatemala;Nicaragua);South America.
|discussion=<p>Echinodorus tenellus has often been separated into two species, one in North America and the other in the tropics. Whenever Echinodorus is studied throughout the range, differences between the two species break down, and a continuum exists from one species to the next. We recognize that overlap; therefore we are combining E. parvulus with E. tenellus.</p>
+
|discussion=<p><i>Echinodorus tenellus</i> has often been separated into two species, one in North America and the other in the tropics. Whenever <i>Echinodorus</i> is studied throughout the range, differences between the two species break down, and a continuum exists from one species to the next. We recognize that overlap; therefore we are combining E. parvulus with <i>E. tenellus</i>.</p>
 
|tables=
 
|tables=
 
|references=
 
|references=
Line 59: Line 59:
 
|publication year=1868
 
|publication year=1868
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V22/V22_403.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V22/V22_403.xml
 
|genus=Echinodorus
 
|genus=Echinodorus
 
|species=Echinodorus tenellus
 
|species=Echinodorus tenellus

Revision as of 15:58, 18 September 2019

Herbs, annual, relatively slender, to 25 cm; rhizomes absent. Leaves: submersed leaves mostly present, sessile; emersed leaves with petioles 4–5-ridged, 1.2–9.5 cm; blade with translucent markings absent, linear, 1–7.4 × 0.2–0.5 cm, base attenuate; if emersed, narrowly lanceolate to ovate. Inflorescences umbels, rarely racemes, of 1–2 whorls, each 4–6-flowered, erect, to 6 × 8 cm, not proliferating; peduncles terete, 1.2–4 cm; rachis absent or if present, terete; bracts connate ca. ½ length, deltate, 2.8–4.9 mm, coarse, margins delicate; pedicels spreading, 0.5–3 cm. Flowers 6–8 mm wide; sepals slightly appressed, 3–5-veined, veins not papillate; petals clawed; stamens 9; anthers basifixed; pistils 15–20. Fruits obovate, flattened, 0–3-ribbed, not abaxially keeled, 0.8–1.5 × 0.8–1 mm, glands absent; beak lateral, 0.1–0.2 mm. Chromosome number unknown.


Phenology: Flowering summer–fall.
Habitat: Sandy soil along margins of small streams or lakes
Elevation: 0–1500 m

Distribution

V22 403-distribution-map.jpg

Ala., Conn., Fla., Ga., Ill., Kans., Mass., Mich., N.Y., S.C., Tex., Vt., se Mexico, West Indies, Central America (Guatemala, Nicaragua), South America.

Discussion

Echinodorus tenellus has often been separated into two species, one in North America and the other in the tropics. Whenever Echinodorus is studied throughout the range, differences between the two species break down, and a continuum exists from one species to the next. We recognize that overlap; therefore we are combining E. parvulus with E. tenellus.

Selected References

None.

Lower Taxa

None.
... more about "Echinodorus tenellus"
Robert R. Haynes +  and C. Barre Hellquist +
(Martius) Buchenau +
Alisma tenellum +
Ala. +, Conn. +, Fla. +, Ga. +, Ill. +, Kans. +, Mass. +, Mich. +, N.Y. +, S.C. +, Tex. +, Vt. +, se Mexico +, West Indies +, Central America (Guatemala +, Nicaragua) +  and South America. +
0–1500 m +
Sandy soil along margins of small streams or lakes +
Flowering summer–fall. +
Index Crit. Butom. Alism. Juncagin. +
Echinodorus parvulus +, Echinodorus tenellus var. parvulus +  and Helianthium parvulum +
Echinodorus tenellus +
Echinodorus +
species +