PL end. ph. 21. ORCHIDE^. 153. Corallorhiza. 215 



tellum apicular, prominent behind ; anther marginal, placed 

 at top, short, rather 2-globular; cells 2-ceIlulate, openino- 

 rather transversely ; pollen in 2 distinct masses, nearly glo- 

 bular, one before, one behind. — tierh light brown, leafless; 

 root zinziberaceous, fleshy ; spike loose, few-flowered ; hrac- 

 tece very small. 



Corallorhiza in?iata. 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. 



Fara. XVII. 22. ALISMACE^E. Richard. Alismacearum 

 sectio, De Candoile. Juncorum sectio, Jussieu. 

 Tripe taloidearum 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 or 2-seeded; styles and stig- 

 mata many; camares 1 or 2-seeded; seeds erect, on the 

 sutures ; perisperm ; corculum incurved ; radical below. — 

 Root fibrous, with roundish tubers ; herh 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 ; flowers unisexual. 

 Caware5 1 -seeded; e^anora globose .. Sagittaria. 154<, 



I. 154.. SAGITTARIA. Lobell. Arrowhead. 



PerigonmjTi 6-sepaled ; 5/a7?zew5 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. 



