Croton sancti-lazari

Croizat

J. Arnold Arbor. 26: 185. 1945.

Common names: Trans-Pecos croton
Synonyms: Croton abruptus M. C. Johnston
Treatment appears in FNA Volume 12. Treatment on page 222. Mentioned on page 210.
Revision as of 17:25, 29 July 2020 by imported>Volume Importer
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Shrubs, 1–4 dm, dioecious. Stems much branched proximally, coarsely stellate-tomentose. Leaves not clustered; stipules each 1 glandular papilla, 0.1 mm; petiole 0.1–0.4 (–0.6) cm, 1/10–1/5 blade length, glands absent at apex; blade ovate to elliptic-ovate, 1–3 (–4.5) × 0.5–1.5 (–2) cm, base usually rounded to obtuse, rarely acute, margins entire, apex acute or rounded, abaxial surface pale green to pale-yellow, stellate-tomentose, adaxial surface darker green, stellate-tomentose. Inflorescences unisexual; staminate racemes, 1–3.3 cm, flowers 1–8; pistillate congested racemes, 0.1–0.3 cm, flowers 1–3. Pedicels: staminate 1 mm, pistillate 0–0.5 mm. Staminate flowers: sepals (4–) 5, 2 mm, abaxial surface stellate-hairy; petals (4–) 5, narrowly oblanceolate, 1.8–2 mm, abaxial surface nearly glabrous; stamens 9–12. Pistillate flowers: sepals 5, equal, 1 mm, margins entire, apex straight to slightly incurved, abaxial surface stellate-hairy; petals 0 or rudimentary; ovary 3-locular; styles 3, 1.5–2 mm, 2-fid to base, terminal segments 6. Capsules 4–5 × 5.5–6 mm, smooth; columella apex with 3 rounded, inflated lobes. Seeds 3.6–4.7 × 2.8–3.4 mm, shiny.


Phenology: Flowering Oct–Nov.
Habitat: Rocky hillsides.
Elevation: 900–1200 m.

Distribution

V12 592-distribution-map.jpg

Tex., Mexico (Chihuahua), Mexico (Coahuila)

Discussion

Croton sancti-lazari in the flora area grows only in Brewster and Presidio counties.

Selected References

None.

Lower Taxa

None.

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

... more about "Croton sancti-lazari"
pale green +  and pale-yellow +
stellate-hairy +, glabrous +  and stellate-tomentose +
stellate-tomentose +
straight +
rounded;acute +
Benjamin W. van Ee +  and Paul E. Berry +
Croizat +
acute +, usually rounded +  and obtuse +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
ovate;elliptic-ovate +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Trans-Pecos croton +
Tex. +, Mexico (Chihuahua) +  and Mexico (Coahuila) +
900–1200 m. +
pistillate +  and staminate +
subtending +
Rocky hillsides. +
scale-like +  and stellate +
axillary +  and terminal +
palmate +  and pinnate +
colorless +  and reddish +
deciduous +, semideciduous +  and persistent +
inflated;rounded +
palmate +  and pinnate +
denticulate +  and crenate +
extrastaminal +
pistillate +  and staminate +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
pale green +  and white +
list;count;distinct +
rudimentary +
oblanceolate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering Oct–Nov. +
(1-)3-carpellate +
J. Arnold Arbor. +
pistillate +  and staminate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.36 cm3.6 mm <br />0.0036 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
lenticular +, globose +, ovoid +, oblong +  and ellipsoid +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
valvate +  and imbricate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
distinct +  and connate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
stellate-tomentose +
caducous +, deciduous +  and persistent +
0.1 cm1 mm <br />0.001 m <br /> (?) +
connate +  and distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (?) +  and 0.2 cm2 mm <br />0.002 m <br /> (?) +
Croton abruptus +
Croton sancti-lazari +
species +
perennial +  and annual +
14 +, 10 +, 9 +  and 8 +