Lilium grayi
Lilium parryi
Gray's lily
lemon lily, Parry lily
often yellowish, rhizomatous, unbranched, 2.2–2.6 × 3.8–5 cm, 0.5–0.6 times taller than long, 2 years’ growth evident as annual bulbs, scaleless sections between these 1.2–2.5 cm;
scales 1–2-segmented, longest 0.9–2.2 cm;
stem roots present.
rhizomatous, unbranched, continuously scaly, 1.5–4.7 × 3.5–11 cm, 0.2–0.6 times taller than long;
scales (1–)2(–4)-segmented, longest 0.9–3.7 cm;
stem roots absent.
to 1.3 m. Buds rounded in cross section.
to 1.9 m. Buds rounded in cross section.
in 3–5 whorls or partial whorls, 3–12 leaves per whorl, ± horizontal to occasionally slightly ascending, drooping at tips, 4.1–12.7 × 1.5–3.6 cm, 1.9–5 times longer than wide;
blade elliptic, occasionally narrowly so or barely lanceolate, margins not undulate, apex acute, usually barely acuminate in distal leaves;
principal veins impressed adaxially, veins and margins noticeably roughened abaxially with tiny ± deltoid epidermal spicules, especially apically and on proximal leaves.
occasionally scattered in young plants or in 1–5 whorls or partial whorls, 3–18 leaves per whorl, ± horizontal and drooping at tips or ascending, 7.8–29 × 0.5–4.9 cm, 2.6–29 times longer than wide;
blade elliptic to narrowly linear, or ± obovate, often lanceolate in distal leaves, margins not undulate, apex acute, often narrowly so;
veins and margins ± smooth abaxially.
racemose, 1–9(–16)-flowered.
racemose, 1–31-flowered.
nodding, not fragrant;
perianth campanulate;
sepals and petals barely recurved 2/3–9/10 along length from base, yellow-orange proximally, pale red distally, spotted maroon, pale red or sometimes red-orange abaxially, not distinctly clawed;
sepals not ridged abaxially, 3.2–5.6 × 1.3–2 cm;
petals 3.1–5.5 × 1.2–2 cm;
stamens included;
filaments ± parallel to style, barely spreading, diverging 3°–9° from axis, red;
anthers magenta, 0.4–1.2 cm;
pollen brown-rust;
pistil 2.4–3.8 cm;
ovary 0.8–1.7 cm;
style red;
pedicel 2.6–6.5 cm.
opening before dusk, horizontal or somewhat nodding, slightly bilaterally symmetric, strongly fragrant;
perianth funnelform;
sepals and petals recurved 3/5 along length from base, lower less recurved than upper and forming landing platform, bright yellow with sparse, usually minute maroon spots, not distinctly clawed;
sepals not ridged abaxially, oblanceolate, 7.7–10.7 × 1.1–1.7 cm;
petals noticeably wider than sepals, often very wide distally, 7.8–10.6 × 1.1–2.1 cm, apex widely acute or sometimes obtuse;
stamens barely exserted;
filaments barely spreading, diverging at 5°–12°;
anthers pale magenta-brown, 0.8–1.4 cm;
pollen rust-orange or orange-brown;
pistil 5.3–9.3 cm;
ovary 1.6–2.9 cm;
style green, often pale;
pedicel 2–17.5 cm.
2.1–3.7 × 1.5–2.1 cm, 1.5–2.1 times longer than wide.
3.9–5.9 × 1.1–1.7 cm, 2.5–4.4 times longer than wide.
not counted.
141–303.
= 24.
= 24.
Lilium grayi
Lilium parryi
The narrowly endemic Gray’s lily blooms predictably on or about July 4 in the balds and forest openings of the Roan Mountain massif shared by North Carolina and Tennessee. In its unadulterated form it also occupies the higher elevations of the Blue Ridge Mountains, including Grandfather Mountain in North Carolina and Mount Rogers and Whitetop Mountain in Virginia. A few populations occur at lower elevations (below 900 m) in streamside meadows along the Blue Ridge Parkway in northern North Carolina (Alleghany County), but in similar settings farther north in Virginia introgression with L. canadense occurs.
Lilium ×pseudograyi Grove (as species) is a name given to frequent hybrids between L. grayi and L. canadense that are scattered at somewhat lower elevations (usually 700–1000 m) in the southern Appalachians. The generally small stature of these hybrids is misleading and encourages the label of bona fide L. grayi, but in most respects they are intermediate. Sepal lengths of 4.8–6.2 cm and floral tube lengths of 3.2–4 cm predominate, and these are between the ranges of the two parent species. The freshwater wetland or moist hardwood habitat of these hybrids also reveals the contribution of L. canadense to their genome.
J. K. Small (1933) made reference to depredations by lily enthusiasts who sought Gray’s lily because of its supposed rarity, and this continues today, though to a lesser degree. Of greater threat, perhaps, is succession on the high grassy balds that gradually shades and crowds the plants; like most lilies, this one requires open conditions for vigor and reproduction.
Although fritillaries (Speyeria spp., family Nymphalidae) pilfer nectar from flowers of Gray’s lily, ruby-throated hummingbirds [Archilochus colubris (Linnaeus), family Trochilidae] are its only reliable pollinator. This red, tubular-flowered lily represents the zenith of pollinator-mediated evolution in the eastern true lilies, and is a high-elevation derivative of the ancestral stock that also produced Lilium canadense. The level of floral convergence with independently derived western Lilium species such as L. bolanderi and L. maritimum is remarkable and must be due to selection pressures exerted by hummingbirds during the floral evolution of these species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Plants in Arizona start to bloom in May (T. H. Kearney and R. H. Peebles 1960), while the majority of California plants flower in July and August.
Plants from the San Gabriel Mountains of California sometimes have wider leaves and have been given status as Lilium parryi var. kessleri, but this variation is due primarily to the rather shaded habitat of many of these populations. No significant vegetative discontinuity can be recognized across the range of this species, so no varieties are recognized here.
Lilium parryi probably arose from an ancestor in common with L. pardalinum (M. W. Skinner 1988), and subsequently diverged to become pollinated by various hawkmoths (family Sphingidae). The flowers are remarkably similar in form and function to those of L. washingtonianum, which is also moth-pollinated, but this resemblance is due to evolutionary convergence.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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