Euphorbia ocellata subsp. rattanii

(S. Watson) Oudejans

Phytologia 67: 47. 1989.

Common names: Rattan’s sandmat
Endemic
Basionym: Euphorbia rattanii S. Watson Proc. Amer. Acad. Arts 20: 372. 1885
Synonyms: Chamaesyce ocellata subsp. rattanii (S. Watson) Koutnik C. rattanii (S. Watson) Millspaugh E. ocellata var. rattanii (S. Watson) L. C. Wheeler
Treatment appears in FNA Volume 12. Treatment on page 280. Mentioned on page 279.

Stems 10–22 cm, pilose. Leaves: stipules 1–1.5 mm, pilose; petiole 0.9–2 mm, pilose; blade 4.2–9.5 × 2.7–5 mm, apex acute to obtuse, surfaces pilose; lateral-veins visible abaxially on larger leaves. Peduncle 1–2.2 mm. Involucre 2–2.5 × 1.7–2.4 mm, pilose; gland appendages present. Pistillate flowers: ovary pilose. Capsules 1.9–2.4 × 2–3.1 mm, pilose; columella 1.6–2 mm. Seeds pale gray to black, oblong, 1.6–1.7 × 0.8–1.2 mm, rugose.


Phenology: Flowering and fruiting summer–fall, occasionally spring.
Habitat: Roadsides, gravelly or sandy dry stream beds.
Elevation: 80–500 m.

Discussion

Subspecies rattanii occurs in the Sacramento Valley in Colusa, Glenn, and Tehama counties.

Selected References

None.

Lower Taxa

None.

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

acute;obtuse +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
orbiculate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Victor W. Steinmann +, Jeffery J. Morawetz +, Paul E. Berry +, Jess A. Peirson +  and Ya Yang +
(S. Watson) Oudejans +
rounded +  and cordate +
Euphorbia rattanii +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
ovate;deltate or falcate +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
subglobose +  and broadly ovoid +
0.2 cm2 mm <br />0.002 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Rattan’s sandmat +
80–500 m. +
red +  and yellow +
0.4mm;0.6mm +
subtending +
oblong +  and orbiculate +
0.5mm +  and 0.7mm +
Roadsides, gravelly or sandy dry stream beds. +
axillary +  and terminal +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
campanulate +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
caducous +, deciduous +  and persistent +
bractlike +
palmate +  and pinnate +
toothed +  and entire +
0.1 cm1 mm <br />0.001 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
connate;distinct +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering and fruiting summer–fall, occasionally spring. +
pale gray;black +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
free +, connate +  and distinct +
decumbent +, reclining +, ascending +  and erect +
flattened +  and terete +
10 cm100 mm <br />0.1 m <br /> (22 cm220 mm <br />0.22 m <br />) +
interpetiolar +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
connate +  and distinct +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (?) +  and 0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +
Chamaesyce ocellata subsp. rattanii +, C. rattanii +  and E. ocellata var. rattanii +
Euphorbia ocellata subsp. rattanii +
Euphorbia ocellata +
subspecies +
axillary +  and terminal +
10 +, 9 +, 8 +, 7 +  and 6 +