Malaxis corymbosa

(S. Watson) Kuntze

Revis. Gen. Pl. 2: 673. 1891.

Basionym: Microstylis corymbosa S. Watson Proc. Amer. Acad. Arts 18: 195. 1883
Synonyms: Achroanthes corymbosa (S. Watson) Greene
Treatment appears in FNA Volume 26. Treatment on page 630. Mentioned on page 627, 631.

Plants 6–40 cm. Pseudobulbs 5–15 mm diam. Leaves 1 (–2, rarely), near middle of stem; blade green, glossy, oval or broadly elliptic, cordate, 3–9 × (1.2–) 3–6.4 cm, apex acute. Inflorescences corymbose racemes, 1.5–3 cm; floral bracts triangular, 0.8–1.2 (–2.5) mm, apex acute; pedicels crowded. Flowers 10–33, resupinate, green; sepals recurved at apex, ovate-elliptic or lanceolate, (2.8–) 3.6–4.2 × 1.4–1 (–2) mm, apex subobtuse to acute; petals strongly reflexed, crossing behind flower, linear to filiform, (2–) 3.5–4 × 0.2–0.6 mm, apex obtuse; lip triangular, 3–4 × 1.5–2.3 mm, base upcurved, cordate or hastate-auriculate, apex entire, narrowly obtuse to somewhat abruptly acuminate; column 0.4–0.6 (–1) × 0.4–0.6 (–1) mm; pollinia yellow. Capsules horizontal to erect, ellipsoid, 12 × 4 mm.


Phenology: Flowering summer.
Habitat: Shaded mountain canyons
Elevation: 2000 m

Distribution

V26 1291-distribution-map.jpg

Ariz., Mexico, n Central America

Discussion

Malaxis corymbosa grows in the Santa Rita, Huachuca, and Chiricahua mountains in Arizona. It differs from some of its close relatives in Mexico by having a more flattened and less fleshy lip that is less deeply concave proximal to anthers. Plants have 10–33 flowers open at one time and may produce a much larger number.

The hemipollinaria are apically widely divergent.

Selected References

None.

Lower Taxa

None.
... more about "Malaxis corymbosa"
self-pollination +
Paul M. Catling +  and Lawrence K. Magrath +
(S. Watson) Kuntze +
hastate-auriculate +  and cordate +
Microstylis corymbosa +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
1.2 cm12 mm <br />0.012 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
cordate +, elliptic +  and oval +
3cm;6.4cm +
12 cm120 mm <br />0.12 m <br /> (?) +
horizontal +  and erect +
ellipsoid +
4 cm40 mm <br />0.04 m <br /> (?) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.4mm +  and 0.6mm +
0.4mm +  and 0.6mm +
Ariz. +, Mexico +  and n Central America +
2000 m +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
sessile or +  and minutely strongly pedicellate +
Shaded mountain canyons +
lateral +  and terminal +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lanceolate +, elliptic +  and ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
cauline +  and basal +
reduced +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
proximal +  and middle +
triangular +
larger +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
not +  and revolute +
differing in form and color +
1-many-flowered +  and cymose +
pendent +  and erect +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Flowering summer. +
2 +, 1 +  and 4 +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Revis. Gen. Pl. +
subumbellate +  and spicate +
aerial +  and subterranean +
0.3mm +  and 1mm +
minute +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
distinct +
lanceolate +  and ovate-elliptic +
foliaceous +
not +  and alike +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
branched +, or +  and simple +
pendent +  and erect +
proliferous +
globose +  and swollen +
thickened +  and stout +
concave +  and convex +
Achroanthes corymbosa +
Malaxis corymbosa +
species +
orange +  and yellow +
annual +  and perennial +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +
22 +, 21 +, 20 +, 18 +, 15 +  and 14 +