Salix euxina

I. V. Belyaeva

Taxon 58: 1345. 2009.

Common names: Crack or brittle willow
Synonyms: Salix fragilis var. sphaerica Hryniewiecki
Treatment appears in FNA Volume 7. Treatment on page 43. Mentioned on page 23, 29, 39, 40, 41, 42, 44.

Trees, 6–18 m. Stems: branches highly brittle at base, yellow-green, yellowbrown, or gray-brown, (highly glossy), glabrous; branchlets yellow-green, yellowbrown, or redbrown, (highly glossy), glabrous. Leaves: stipules rudimentary on early ones, rudimentary or foliaceous on late ones, (early deciduous to marcescent), apex acuminate or acute; petiole deeply grooved adaxially (margins usually touching), 6–8.6 mm, with pairs of spherical glands distally, glabrous or puberulent adaxially; largest medial blade hemiamphistomatous or hypostomatous, lanceolate, narrowly oblong, or narrowly elliptic, 60–120 × 14–30 mm, 3.6–6.5 times as long as wide, base convex or rounded, margins flat or slightly revolute, serrate, crenate, or crenulate, apex acute, acuminate, or caudate, abaxial surface (not glaucous), glabrous, adaxial slightly or highly glossy, glabrous; proximal blade margins entire; juvenile blade yellowish green or reddish, glabrous. Catkins: staminate 24–40 × 7–15 mm, flowering branchlet 12–15 mm; pistillate moderately densely flowered, stout, 24–35 mm, flowering branchlet 12–15 mm; floral bract (greenish or tawny), 0.8–1.3 mm, apex convex or rounded, entire or erose, abaxially hairy, hairs straight or wavy. Staminate flowers: abaxial nectary present, adaxial nectary oblong, 0.3–0.6 mm, nectaries distinct; filaments distinct or connate less than 1/2 their lengths, hairy at base; anthers ellipsoid, 0.4–0.5 mm. Pistillate flowers: adaxial nectary oblong or square, 0.3–0.6 mm, shorter than stipe; stipe 0.6–1.2 mm; ovary pyriform, beak gradually tapering to styles; styles connate, 0.3–0.5 mm; stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.3–0.5 mm. Capsules 3–5 mm. 2n = 76.


Phenology: Flowering late spring.
Habitat: Cultivated or riparian

Distribution

V7 32-distribution-map.gif

Introduced; Ont., Que., n, nw Asia, also in Europe

Discussion

Distribution of Salix euxina (formerly S. fragilis) in the flora area is uncertain. It may occur throughout southern Canada and the United States; often known as the cultivar “Bullata,” it rarely escapes. Salix euxina is native to the northern Black Sea and the Transcaucausian regions.

Selected References

None.

Lower Taxa

None.

... more about "Salix euxina"
square +  and oblong +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
reddish turning yellow +  and yellow +
ellipsoid +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
erose +  and entire +
Rounded (?) +, Convex (?) +, Caudate (?) +, Acuminate (?) +  and Acute (?) +
George W. Argus +
I. V. Belyaeva +
rounded +  and convex +
tapering +
reddish +  and yellowish green +
ferruginous +  and white +
toothed +  and 2-fid +
persistent +  and deciduous +
gray-brown +, yellowbrown +  and yellow-green +
flowered +  and sessile +
subglobose +
slender +  and stout +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
flowered +, pistillate +  and staminate +
2.4 cm24 mm <br />0.024 m <br /> (4 cm40 mm <br />0.04 m <br />) +
pendulous +, spreading +  and erect +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Crack or brittle willow +
Ont. +, Que. +, n +, nw Asia +  and also in Europe +
connate +  and distinct +
greenish +  and tawny +
pistillate +  and staminate +
bisexual +  and unisexual +
spherical +
Cultivated or riparian +
straight +
unbranched +  and spicate +
subterminal +  and axillary +
membranaceous +
hypostomatous +  and hemiamphistomatous +
6 cm60 mm <br />0.06 m <br /> (12 cm120 mm <br />0.12 m <br />) +
elliptic +, oblong +  and lanceolate +
1.4 cm14 mm <br />0.014 m <br /> (3 cm30 mm <br />0.03 m <br />) +
arranged +  and alternate +
marcescent +
deciduous +
crenulate +, crenate +, serrate +, revolute +  and flat +
rudimentary +
2-7[-10]-carpellate +
pyriform +
glandular-dotted +
puberulent +  and glabrous +
0.6 cm6 mm <br />0.006 m <br /> (0.86 cm8.6 mm <br />0.0086 m <br />) +
Flowering late spring. +
overlapping +
distinct +
branched +, sympodial +, monopodial +  and branching +
non-papillate +
cylindrical +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
caducous +  and persistent +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +  and deciduous +
ferruginous +  and white +
Salix fragilis var. sphaerica +
Salix euxina +
Salix sect. Salix +
species +
rounded +
sympodial +, branching +  and heterophyllous +