Hexalectris spicata var. arizonica

(S. Watson) Catling & V. S. Engel

Lindleyana 8: 122. 1993.

Common names: Arizona crested coral-root
Basionym: Corallorhiza arizonica S. Watson Proc. Amer. Acad. Arts 17: 379. 1882
Treatment appears in FNA Volume 26. Treatment on page 605. Mentioned on page 603.

Stems pinkish red, pale pink-yellow, or pink-white, 15–70 cm; sheathing bracts 3–5. Flowers cleistogamous or chasmogamous, apparently autogamous; sepals and petals usually not apically recurved on chasmogamous flowers, yellow-tan, pinkish, redbrown, or purple-brown with dull magenta, faint pink-brown to purple-brown veins, margins pale; dorsal sepal lanceolate to oblong, 15–18 × 2.7–4.5 mm; lateral sepals 13–15 × 4–7 mm; petals 14–16 × 4–5 mm; lip 12–14.5 × 10–12 mm, white or creamy white with darkly colored veins and paler margin; lamellae central, pale, 0.2–0.7 mm; column 11–14 mm; rostellum absent; anthers whitish. Capsules 16–25 × 8–15 mm.


Phenology: Flowering May–Aug.
Habitat: In organic mesic to dry soil over limestone or sandstone, in juniper, pine, and oak woodlands
Elevation: 100–600 m (c Tex.), 1600–2000 m (west)

Distribution

V26 1235-distribution-map.jpg

Ariz., N.Mex., Tex., Mexico

Discussion

This autogamous and florally reduced segregate of Hexalectris spicata has been thought to be of hybrid origin, derived either from H. spicata var. spicata and H. nitida, or less likely from the former taxon and H. revoluta (P. M. Catling and V. S. Engel 1993). In Texas this plant tends to begin flowering later than the typical variety, from June and July (P. M. Catling and V. S. Engel 1993), as it does in Arizona and New Mexico, where it flowers in July and August (R. A. Coleman).

Selected References

None.

Lower Taxa

None.
self-pollination +
Douglas H. Goldman +, Ronald A. Coleman +, Lawrence K. Magrath +  and Paul M. Catling +
(S. Watson) Catling & V. S. Engel +
free +  and distinct +
Corallorhiza arizonica +
indehiscent +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not +  and articulate +
conduplicate +  and plicate +
flattened +, triangular +  and cylindric +
reduced +
1.6 cm16 mm <br />0.016 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
white +  and yellowish white +
11mm +  and 14mm +
Arizona crested coral-root +
Ariz. +, N.Mex. +, Tex. +  and Mexico +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
100–600 m (c Tex.), 1600–2000 m (west) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
3-merous +, sessile +  and pedicellate +
maroon +, purple +, magenta +, brown +  and tan +
chasmogamous +, autogamous +  and cleistogamous +
In organic mesic to dry soil over limestone or sandstone, in juniper, pine, and oak woodlands +
lateral +  and terminal +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
falcate +, oblong-ovate +  and oblong-lanceolate +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
cauline +  and basal +
reduced +
creamy white +  and white +
1.2 cm12 mm <br />0.012 m <br /> (1.45 cm14.5 mm <br />0.0145 m <br />) +
3-lobed +, clawed +, ovate +  and obovate +
larger +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
paler +  and pale +
apically triangular +  and rounded +
differing in form and color +
2 (?) +  and 4 (?) +
1-many-flowered +  and cymose +
pendent +  and erect +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1.4 cm14 mm <br />0.014 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering May–Aug. +
aboveground +
aboveground +
articulate +  and branching +
aerial +  and subterranean +
minute +
purple-brown +, redbrown +, pinkish +  and yellow-tan +
free +, distinct +, adnate +  and connate +
foliaceous +
not +  and alike +
branched +, or +  and simple +
pink-white +, pale pink-yellow +  and pinkish red +
proliferous +
thickened +  and stout +
15 cm150 mm <br />0.15 m <br /> (70 cm700 mm <br />0.7 m <br />) +
subterminal +
concave +  and convex +
Corallorhiza spicata +
Hexalectris spicata var. arizonica +
Hexalectris spicata +
variety +
colored +, pink-brown +  and purple-brown +
rootless +  and leafless +
herb +, colonial +  and solitary +
aquatic +, lithophytic +, terrestrial +  and epiphytic +