OKDER 137. ORCHIDACE^ 329 



1 O. FLEXUOSUM. Scape panicled, arising from the base of a bulb ; leaves lanceolate ; 



lip 2-lobed, spotted, much louder than the other petals. Brazil. 



2 O. LURIDUM. Scape erect, branched ; leaves elliptical ; lip reniform, not longer than 



the wavy, retuse petals ; flowers large, olive-colored. From S. America. 2f. 



3 O. PAPILIO, has one spotted ovate leaf and large ye41ow-red butterfly-shaped flowcre. 



9. MICROSTYLIS, N. Sepals spreading, petals filiform or linear, lip 

 concave, sessile. Column minute, -with 2 teeth or lobes at tip. Pollinia, 4. 

 If Root tuberous, with 1 or 2 leaves and small racemed flowers. 



1 M. opliioslossoid.es N. St. 5 5X, with a single ovate (2') leaf near the middle , 



rnc. short (!'), ped. much longer than the minute whitish flowers. Woods, N. June. 



2 M. monoph^llus Lindl. St. 2 &, 3-angled, witn a single ovate leaf ; rac. elonga- 



ted, 20-40-flowered ; pedicels about as long as the flowers (2"). Woods, N. : rare. Jl. 



10. LIPPARIS, Rich. Tw AY-BLADE. Sep. and pet. very narrow. Lip 

 spreading, flat. Column winged. Pollinia 4, parallel with each other, with- 

 out pedicels or glands. V Root tuberous, with 2 Ivs. and a rac. of greenish fls. 



1 L. Itllfolla Rich. Scape about 6' ; leaves 2. radical, lance-ovate, 84' ; petals fili- 



form, ruflexed ; lip purple, 6", abruptly cuspidate ; pedicels 1'. Damp woods. June. 



2 1. Lceaellt Rich. Scape 8 5', about 6-flowered ; pedicels 2" ; lip 2", oblong, mu 



cronate, incurved, wavy ; sepals and petals linear. Fields, Can. to Penn. June. 



11. LISTERA, Br. Tw AY-BLADE. Sep. and pet. subequal, lip pendu- 

 lous, 2-lobed or 2-cleft. Column wingless, anth. dorsal, pollen powdery. 

 If Root fibrous. Stem (4 9') with 2 opposite leaves above the middle. 

 Flowers small, racemed. May July, in damp woods. 



1 L. corduta Br. Lvs. roundish, subcordate, acute ; fls. 10 15, in a short raceme ; 



pedicels length of the ovary ; lip-segment linear, length of the sepals. Penn.. and N. 



2 L. austral!* Lindl. Lvs. ovate ; fls. in a loose raceme ; ped. 3 4 times longer than 



the ovary ; lip-segment linear-setaceous, twice the length of the sepals. N. J., and a. 



3 L,. con vallarloidee Hook. Lvs. round-oval ; fls. few. loose, on slender pedicels ; 



lip twice the length of the sepals (4"), 2-lobed at the dilated apex. Ga.. and N. 



12. SPIRANTHES, Rich. LADIES' TKESSES. Spike spiral. Perianth 

 ringent, the 3 upper pieces ascending and connivent, lip oblong, recurved, 

 channelled, the base embracing the column, and with 2 callous processes. 

 Stigma ovate, beaked, 2-toothed at tip. Anthers dorsal> pollinia 2, each 

 2-lobed, powdeiy. if Stem nearly naked, bearing many white flowers, 

 bent to a horizontal position. 



* Spike dense, with the flowers on all sides. Lvs. present with the flowers.. NOB. 13 



* Spike slender, flowers all in 1 straight or spiral row. x Lvs. permanent No*. 4 C. 



x Lvs. evanescent Nos. 7. 8 



1 S. cernua Rich. Leaves lance-linear, the upper bract-like ; spike oblong to cylin 



dric, 2 4' ; lip very obtuse, crenulate-wavy, conduplicate and recurved ; sepals and 

 petals not connivent, 4 5". Wet. 9 20'. Aug. Oct. 



2 S. KouiaiizovUtua Cham. Lvs. lance-oblong to linear; spike dense, 1 3'; lip 



much recurved, ovate-oblong, crenulate-wavy ; sepals and petals all connivent above 

 into a galea. Bogs, Me. (Miss Towle) to Lake Superior (Prof. Porter). July, Aug. 

 & S, latllolia Torr. Loaves nearly radical, 3-5-veiued, lance-oliloug ; scape bracted, 

 1 8' ; flowers small (23') ; plant glabrous. Meadows, Penn., and N. June, July. 



4 S. odorakta N. St. stout. 1 2f ; Ivs. lance-oblong; fls. yellowish, fragrant, 6", In i, 



spiral row. with leafy bractf ; ip 2-toothed at base. Muddy streams, S. October 



