Cleistes

Richard ex Lindley

Gen. Sp. Orchid. Pl., 409. 1840.

Common names: Spreading pogonia
Etymology: Greek kleistos, closed, alluding to lip and petals that diverge only near apex, forming tube for most of their length, the flower thus appearing closed
Treatment appears in FNA Volume 26. Treatment on page 510. Mentioned on page 492, 498, 511.

Herbs, terrestrial. Roots 1–2 mm wide, sometimes with wider nodular tuberoids, frequently rather brittle. Leaves 1–3 on vegetative plants, 1 (–2) centrally on flowering-stems, sessile; blade oblong-lanceolate or elliptic-oblong. Inflorescences terminal,1–3-flowered; floral bracts leaflike. Flowers resupinate, erect, sessile; sepals olive-green, brown, or maroon, linearlanceolate, apex acuminate; petals rose-pink to white, spatulate or oblanceolate, usually forming tube with lip; lip rose-pink to white, with rose or purple veins, oblanceolate, 3-lobed, middle lobe medially winged or tuberculate, central keel grooved from base to 3/4 its length; column free, white, apex lacerate, truncate; anther terminal, hinged; pollinia 2, without viscidium, soft, mealy; pollen-grains in tetrads. Fruits capsules, erect, cylindric.

Distribution

Tropical and subtropical regions, mostly South America, 2 in Central America

Discussion

Species ca. 25 (2 in the flora).

Authors of some neotropical floras have questioned the separation of Cleistes from Pogonia; most recent North American authors have followed O. Ames (1905–1922) in recognizing Cleistes, and we prefer to do the same until a detailed study suggests otherwise. The two North American species can reproduce asexually by root shoots.

Selected References

None.

Key

1 Column 13–19 mm; lip 21–33(–38) mm. Cleistes bifaria
1 Column 21–25(–29) mm; lip (26–)34–55 mm. Cleistes divaricata

"/4" is not declared as a valid unit of measurement for this property.

... more about "Cleistes"
self-pollination +
Katharine B. Gregg +  and Paul M. Catling +
Richard ex Lindley +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
elliptic-oblong +  and oblong-lanceolate +
Spreading pogonia +
Tropical and subtropical regions +, mostly South America +  and 2 in Central America +
Greek kleistos, closed, alluding to lip and petals that diverge only near apex, forming tube for most of their length, the flower thus appearing closed +
erect +  and resupinate +
lateral +  and terminal +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
cauline +  and basal +
1 (?) +  and 3 (?) +
reduced +
rose-pink +  and white +
3-lobed +  and oblanceolate +
larger +
differing in form and color +
1-many-flowered +  and cymose +
pendent +  and erect +
Gen. Sp. Orchid. Pl., +
aerial +  and subterranean +
1mm +  and 2mm +
minute +
maroon +, brown +  and olive-green +
free +, distinct +, adnate +  and connate +
foliaceous +
not +  and alike +
branched +, or +  and simple +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Cleistes +
Orchidaceae (tribe Vanilleae) subtribe Pogoniinae +
purple +  and rose +
annual +  and perennial +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +