Pl.end.ph. 21. ORCHIDEiE. 153. Corallorhiza. 215 
tellum apicular, prominent behind ; anther marginal, placed 
at top, short, rather 2-globular; cells 2-cell ulate, opening 
rather transversely ; pollen in 2 distinct masses, nearly glo- 
bular, one before, one behind.— Herb light brown, leafless ; 
root zinziberaceous, fleshy ; spike loose, few-flowered ; Irac- 
tece very small. 
Corallorhiza inn at a. Innate coral-root , 
Spur short, adnate; root very much branched. 
Dentaria minor, Ger. em. 1585, 2. 
Ophrys corallorhiza, Lin. S. P. 1339. 
Cymbidium corallorhiza, Swartz , 176. 
Corallorhiza innata, Brown in Ait . Hort. Kew. 5, 209. 
Corallorhiza Halleri, Richard Mem. Mus. 4,61. 
Moist woods ; perennial ; August and September. 
Stem 9 in. high, yellowish brown, scaly; scales alternate; 
flowers small ; capsules widely elliptic, hanging down. 
Fam. XVII. 22. ALISMACEiE. Richard. Alismacearum 
sectio , De Candolle. Juncorum sectio , Jussieu. 
Tripetaloidearum genera qucedam, Lin. 
Perigonium 6-sepaled; 3 outer sepales herbaceous, per- 
sisting ; 3 inner petaloid, coloured ; stamens 6 or indefinite ; 
ovaries many, free, 1 -celled, 1 or2-seeded; styles said stig- 
mata many; camares 1 or 2-seeded; seeds erect, on the 
sutures ; perisperm 0 ; corculum incurved ; radical below. — 
Root fibrous, with roundish tubers ; herl aquatic, stemless, 
perennial ; leaves petiolate, longitudinally ribbed ; flowers 
verticillately spiked. 
Stamens 6 ; flowers hermaphrodite , 
Camares 2 or 3-seeded ; etarion stellate 
Damasonium. 156. , 
Camares 1 -seeded ; etarion globose Alisma. 155. 
Stamens many ; floivers unisexual. 
Camares 1^ -seeded; etarion globose .. Sagittaria. 154. 
I. 154. SAGITTARIA. Lobell. Arrowhead. 
Perigonium 6-sepaled ; stamens many, indefinite; ovaries 
many, indefinite; etarion globose; camares 1 -seeded, dis^ 
tinct, compressed, edged . — Leaves sagittate, palmate-ribbed; 
spike verticillate ; flowers unisexual ? the upper male. 
