familyEuphorbiaceae
genusCroton
speciesCroton michauxii
varietyCroton michauxii var. elliptica

Croton michauxii var. elliptica

(Willdenow) B. W. van Ee & P. E. Berry

Harvard Pap. Bot. 14: 68. 2009.

Benjamin W. van Ee, Paul E. Berry
Common names: Elliptic-leaf rushfoil Willdenow’s croton
Endemic
Basionym: Crotonopsis elliptica Willdenow Sp. Pl. 4: 380. 1805
Synonyms: Croton willdenowii G. L. Webster Leptemon ellipticum (Wildenow) Rafinesque
Treatment appears in FNA Volume 12. Treatment on page 220.

Leaf-blades lanceolate to ovatelanceolate, 1.5–4 × 0.1–0.4 (–1.5) cm; abaxial surface (midstem leaves) hairs with radii separate less than 1/2 length, adaxial surface hairs often slightly raised, overlapping near midvein, radii usually 1–3. Inflorescences usually less than 1 cm, achenes 1–2, crowded at base (appearing sessile in axil of subtending leaf). Staminate flowers usually less than 1 mm diam. Achenes sparsely stellate-lepidote, hairs appressed, radii joined most or all of length, umbos usually blunt, rarely sharp.


Phenology: Flowering Jun–Oct.
Habitat: Sandstone and granitic outcrops (glades), disturbed sandy soils, forest openings, eroded slopes.
Elevation: 0–300 m.

Distribution

V12 241-distribution-map.jpg

Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Miss., Mo., N.J., N.C., Okla., Pa., S.C., Tenn., Tex., Va.

Discussion

Selected References

None.

Lower Taxa

None.

"connate" is not a number. "distinct" is not a number.

... more about "Croton michauxii var. elliptica"
RDF feed
Abaxial surface coloration
silvery +
Abaxial surface pubescence
lepidote +, glabrous +  and stellate-lepidote +
Achene architecture or pubescence or relief
smooth +
Achene arrangement
crowded +
Achene length
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Achene pubescence
stellate-lepidote +
Achene quantity
1 (2) +
Achene width
1mm;1.2mm +
Adaxial surface coloration
green +
Adaxial surface pubescence
stellate-hairy +
Anther dehiscence
dehiscing +
Apex course
straight +
Apex shape
acute +
Author
Benjamin W. van Ee +  and Paul E. Berry +
Authority
(Willdenow) B. W. van Ee & P. E. Berry +
Base architecture or shape
pinnate +
Base shape
acute +  and cuneate +
Basionyms
Crotonopsis elliptica +
Blade atypical width
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Blade length
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Blade shape
lanceolate-linear;ovatelanceolate +
Blade width
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Bract presence
absent +
Caruncle presence
absent +
Columella presence
absent +
Common name
Elliptic-leaf rushfoil +  and Willdenow’s croton +
Cyme arrangement
fascicles +
Distribution
Ala. +, Ark. +, Conn. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Md. +, Miss. +, Mo. +, N.J. +, N.C. +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +  and Va. +
Elevation
0–300 m. +
Flower architecture
staminate +
Flower architecture or arrangement or growth form
solitary +
Flower diameter
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Flower quantity
1;6 +
Flower reproduction
unisexual +
Fruit dehiscence
septicidal +
Gland position
subtending +
Gland presence
absent +
Habitat
Sandstone and granitic outcrops (glades), disturbed sandy soils, forest openings, eroded slopes. +
Hair fixation or orientation
appressed +
Hair length
joined +
Hair shape
scale-like +  and stellate +
Hypanthium presence
absent +
Illustration copyright
Flora of North America Association +
Illustrator
Barbara Alongi +
Inflorescence position
axillary +  and terminal +
Inflorescence reproduction
bisexual +
Inflorescence some measurement
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Laminar gland architecture
palmate +  and pinnate +
Laminar gland presence
absent +
Latex coloration
colorless +  and reddish +
Latex presence
absent +
Leaf-blade atypical width
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Leaf-blade length
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Leaf-blade shape
lanceolate;ovatelanceolate +
Leaf-blade width
0.1cm;0.4cm +
Leaf architecture
simple +
Leaf architecture or arrangement
fascicled +
Leaf arrangement
alternate +
Leaf arrangement or growth form
not clustered +
Leaf coloration
orange +
Leaf duration
deciduous +, semideciduous +  and persistent +
Leaf life cycle
older +
Margin architecture
palmate +  and pinnate +
Margin architecture or shape
entire +
Margin pubescence
villous +
Margin shape
denticulate +  and crenate +
Midvein quantity
1 (3) +
Nectary position
extrastaminal +
Nectary presence
absent +
Nectary quantity
5 +
Nectary shape
annular +
Number of lower taxa
0 +
Ovary architecture or structure in adjective form
1-locular +
Ovary placentation
axile +
Ovary position
superior +
Ovule orientation
anatropous +
Ovule quantity
1 +
Pedicel architecture
staminate +  and pistillate +
Pedicel presence
absent +
Pedicel some measurement
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Perianth position
hypogynous +
Petal atypical quantity
5 (6) +
Petal coloration
pale green +  and white +
Petal fusion
list;count;distinct +
Petal presence
absent +
Petal quantity
5 +
Petal shape
spatulate +
Petal some measurement
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Petiole presence
absent +
Petiole some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Phenology
Flowering Jun–Oct. +
Pistil architecture
(1-)3-carpellate +
Pistil quantity
1 +
Pistillode presence
absent +
Publication title
Harvard Pap. Bot. +
Publication year
2009 +
Radius quantity
few +
Reference
None +
Seed-coat fusion
adherent +
Seed length
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Seed quantity
1 +
Seed shape
lenticular +, globose +, ovoid +, oblong +  and ellipsoid +
Seed width
1 cm10 mm <br />0.01 m <br /> (?) +
Sepal arrangement
valvate +  and imbricate +
Sepal atypical quantity
4 (5) +
Sepal fusion
distinct +  and connate +
Sepal presence
absent +
Sepal quantity
5 +
Sepal some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Sepal variability
equal +
Slit dehiscence or orientation
longitudinal +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V12/V12 241.xml +
Special status
Endemic +
Spike some measurement
0.3 cm3 mm <br />0.003 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Stamen atypical quantity
35 (50) +
Stamen fusion
distinct +
Stamen orientation
inflexed +
Stamen quantity
5;7 +
Stem architecture
branched +
Stem coloration
silvery +
Stem pubescence
stellate-lepidote +
Stem quantity
single +
Stigma quantity
1;32 +
Stipule duration
caducous +, deciduous +  and persistent +
Stipule presence
absent +
Stipule prominence
rudimentary +
Style architecture
unbranched +
Style atypical quantity
1 (3) +
Style fusion
connate +  and distinct +
Style quantity
3 +
Style shape
2-fid +
Style some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.08 cm0.8 mm <br />8.0e-4 m <br /> (?) +
Surface hair arrangement
overlapping +
Surface hair prominence
raised +
Surface prominence
not visible +
Synonyms
Croton willdenowii +  and Leptemon ellipticum +
Taxon family
Euphorbiaceae +
Taxon name
Croton michauxii var. elliptica +
Taxon parent
Croton michauxii +
Taxon rank
variety +
Terminal segment quantity
6;3 +
Umbo shape
sharp +  and blunt +
Volume
Volume 12 +
Whole organism duration
annual +
Whole organism growth form
herb +
Whole organism reproduction
monoecious +
Whole organism some measurement
1dm (9dm) +
X chromosome quantity
14 +, 10 +, 9 +  and 8 +