(281) 



2, Spiranthes Richard LADIES' TUE&SES. 



Anther 1, persistent, not connate with the 

 column; pollinia 2, attached to the common 

 gland. Perigoniuni oblique ; labellum en- 

 closed, canaliculate, embracing with its base 

 the short column. 2. Flowers forming a 

 spiral spike. 



1. S. ROMANZOFFIANA Cham. Callosities of 

 the lip smooth, obscure; flowers greenish- 

 white. Presidio. Marin County. Autumn. 



2. S. PORRIFOLIA Lindl. Callosities of the 

 lip prominent, pointing downward ; flowers 

 greenish-white. Marin County. Autumn. 



3, Habenaria Willd. 



Anther 1, persistent, entirely connate witli 

 the column; pollinia 2, divergent at the lower 

 end. Perigonium ringent, galeate ; lip elon- 

 gate, spreading, calcarate. Column short. 

 2 . Caulescent. 



1. H. ELEGANS Bolander. Sepals 1-nerved; 

 flowers green. Oakland hills. San Mateo. 

 San Francisco [extinct]. Summer. 



2. H, LEUC o STACK YS Watson. Sepals 

 3-nerved ; flowers white. Saucelito. San 

 Francisco [extinct]. Summer. 



4, Corallorhiza Haller! CORAL-ROOT. 



Anther 1, terminal, caducous, not adnate to 

 to the column; pollinia 4, globose. Perigonium 



