Piperia michaelii

(Greene) Rydberg

Bull. Torrey Bot. Club 28: 640. 1901.

IllustratedEndemic
Basionym: Habenaria michaelii Greene Bull. Calif. Acad. Sci. 1: 282. 1885
Synonyms: Piperia elongata subsp. michaelii (Greene) Ackerman
Treatment appears in FNA Volume 26. Treatment on page 576. Mentioned on page 572, 575.

Plants 9–70 cm. Stems attenuate toward tuberoid, fistulous, 1.5–12 (–17) mm diam. distal to leaves; bracts 3–50. Leaves prostrate to erect-spreading; blade 7–22 (–30) × 1.5–4 (–6.2) cm. Inflorescences ± densely flowered, 3–33 cm; rachis usually shorter than peduncle; bracts 4–17 (–22) mm. Flowers green, fragrance nocturnal, strong, pleasant; sepals 2–4.8 × 1.3–3.7 mm; dorsal sepal ovate-elliptic to ovate; lateral sepals spreading to recurved, oblong-lanceolate to oblong-ovate; petals erect-spreading, asymmetrically triangular-ovate, 2.2–4.5 × 1–2.2 mm; lip straight to ± bent, ovate-triangular, 1.7–5 × 1.3–5 mm; spurs mostly deflexed, sometimes mixed with horizontal ones, 9–16 mm; viscidia broadly oblong, 0.4–0.75 × 0.15–0.4 mm; rostellum blunt. Capsules 5–13 mm. Seeds blackish brown, rarely brown.


Phenology: Flowering late Apr–mid Aug.
Habitat: Coastal bluffs and scrub, chaparral, oak woodland
Elevation: 0–700 m

Discussion

Coastal plants of Piperia michaelii are stouter, have more stem bracts and denser inflorescences, and are later blooming than interior populations. Occasionally the seeds of plants in interior locations are brown. Where P. michaelii and P. elongata are sympatric, the former blooms earlier than the latter.

Selected References

None.

Lower Taxa

None.
... more about "Piperia michaelii"
self-pollination +
James D. Ackerman +  and Randall Morgan +
(Greene) Rydberg +
Habenaria michaelii +
indehiscent +
simple +  and sessile +
conduplicate +  and plicate +
22 cm220 mm <br />0.22 m <br /> (30 cm300 mm <br />0.3 m <br />) +
4 cm40 mm <br />0.04 m <br /> (6.2 cm62 mm <br />0.062 m <br />) +
7 cm70 mm <br />0.07 m <br /> (22 cm220 mm <br />0.22 m <br />) +
lanceolate +  and oblanceolate +
1.5cm;4cm +
1.7 cm17 mm <br />0.017 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 1.3 cm13 mm <br />0.013 m <br /> (?) +
inconspicuous +
parallel +  and close +
0–700 m +
pleasant +
ellipsoid;sausage-shaped +
Coastal bluffs and scrub, chaparral, oak woodland +
lateral +  and terminal +
3 cm30 mm <br />0.03 m <br /> (33 cm330 mm <br />0.33 m <br />) +
spreading +  and recurved +
oblong-lanceolate +  and oblong-ovate +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
ephemeral +
cauline +  and basal +
2 (?) +  and 6 (?) +
reduced +
straight +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
ovate-triangular +  and bent +
larger +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
differing in form and color +
horizontal +
1-many-flowered +  and cymose +
pendent +  and erect +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
erect-spreading +
0.1 cm1 mm <br />0.001 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Flowering late Apr–mid Aug. +
Bull. Torrey Bot. Club +
spicate +  and many-flowered +
aerial +  and subterranean +
minute +
free +, distinct +, adnate +  and connate +
foliaceous +
not +  and alike +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
Illustrated +  and Endemic +
clavate +  and filiform +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
pendent +  and erect +
proliferous +
attenuate +
thickened +  and stout +
Piperia elongata subsp. michaelii +
Piperia michaelii +
species +
ellipsoid-ovoid +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.075 cm0.75 mm <br />7.5e-4 m <br />) +
0.015 cm0.15 mm <br />1.5e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +