ORCHID FAMILY 321 



LYSIELLA Rydberg 1900 

 (Dim. of Lysia) 



Sepals and petals greenish-yellow, free, similar, spreading, lip linear- 

 lanceolate, entire, spur shorter than the curved ovary, beak of stigma with- 

 out appendages, stem with a single obovate leaf at base; low herbs from a 

 rootstalk. 

 Stems 2-8 in. high ; leaf 2-5 in. long ; flowers 5-6 mm. 



long, the lip deflexed L. obtusdta 



PERAMIUM Salisbury 1812 RATTLESNAKE PLANTAIN 



(Gr. per as, limit, line, from the barred leaves) 



PL 43, fig. 4. 



Sepals and petals white, the upper sepal united with the 2 petals into 

 a hood, lip entire, concave or sack-like, the apex reflexed, anther attached 

 to the column by a short stalk, pollinia 1 in each sack; flowers in bracted 

 spikes ; leaves basal, usually splotched with white ; perennial from fleshy 

 roots. 



1. Stems 3-10 in. high; leaves 1-3 cm. long; spike 



1-sided ; lip plainly sack-like P. repens 



2. Stems 8-20 in, high; leaves 3-6 cm. long; spike 



not 1 -sided ; lip hardly sack-like P. Menziesii 



PIPERIA Rydberg 1901 

 (Named for Piper, an American botanist) 



Sepals and petals greenish or white, lance-linear to ovate, truncate or 

 hastate at base, lip oblong, obtuse, lobed near the base, stigma a small beak 

 between the anthers, spur linear or club-shaped barely longer than the lip ; 

 flowers spirally arranged in a bracted spike ; leaves mostly basal, those of 

 the stem reduced, generally dead or withering at flowering time ; herb with 

 tuberous roots. 



Stems 1-2 ft. high, leafy below ; leaves oblanceolate ; 

 flowers greenish P. unalaschensis 



SPIRANTHES Persoon 1807 LADIES' TRESSES 

 (Gr. speira, spiral, anthos, flower) - 



Sepals free or united with the petals into a hood, lip concave, erect, 

 embracing the column and often adhering to it, spreading and wavy, or 

 toothed at the apex, column arched below, stigma ovate, extending into a 

 pointed beak, pollinia 2; flowers white, spurless, spirally twisted in a 1-3- 



