Aplectrum hyemale (Muhl. ex Willd.) Nutt.

Putty Root, Adam and Eve Orchid

Aplectrum hyemale plant

SRTurner

Family - Orchidaceae

Habit - Perennial forb, from a globose tuberous corm and roots with mycorrhizal dependency.

Stem - Erect, to 60 cm.

Aplectrum_hyemale_corm

Corm.
GVanBrunt

Leaf - Basal leaf 1, petiolate, arising from youngest corm, overwintering. Basal leaf blade elliptic, glabrous, papery, slighly corrugated, dark green with conspicuous lighter colored parallel venation. Cauline leaves reduced to sheathing bracts.

Aplectrum_hyemale_leaf

Basal leaf.

The striped, pleated appearance is diagnostic. These leaves are visible in the off season, typically during winter and early spring.
SRTurner

Inflorescence - Terminal raceme.

Aplectrum_hyemale_bud

Flower buds.
SRTurner

Aplectrum_hyemale_inflorescence

Inflorescence.
SRTurner

Flowers - Sepals and lateral petals similar, 10-15 mm long, oblanceolate, yellow to brownish green with purple tips. Lip 10-15 mm long obovate, with 2 short lateral lobes, white with purple markings. Column 8-12 mm long, pale green with purple spots. Stamen 1.

Aplectrum_hyemale_flower4

Flower, lateral view,
SRTurner

Aplectrum_hyemale_flower

Flower.
SRTurner

Aplectrum_hyemale_flower2

SRTurner

Aplectrum_hyemale_flower3

SRTurner

Fruits - Pendent capsules, 1.5-2.5 cm long, elliptic in outline, strongly ribbed.

Aplectrum_hyemale_fruits

Fruits.
SRTurner

Flowering - May - June.

Habitat - Rich mesic forests.

Origin - Native to the U.S.

Other info. - This is one of the more common orchids in Missouri. The single basal leaf is often seen in rich forests during the winter, when it is almost the only green thing present. The leaf manufactures food for the plant throughout the winter and early spring months, enabling production of the inflorescence in mid-spring. The dried fruit stalks are also a reasonably common sight in the same areas, in late fall.

Photographs taken at Faust County Park, St. Louis County, MO, mostly on 5-7-2014 (SRTurner). Photo of corm by G.Van Brunt.



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