150 THE AMERICAN BOTANIST 



— Species of Listera and Liparis. These are so-called for tlie 

 twin leaves or tvva (two) blades. Our only species of 

 Liparis is liliifolia known as the "large tway-blade." Listera 

 convallarioides is the "broad-leaved tway-blade." Listera 

 cordata varies this nomenclature by "double-leaf" and "twin- 

 foil" while L. locsclii is the "fen orchis." 



The moist shades amidst which the orchids so frequently 

 grow, have indissolubly connected them in the mind of the 

 public wtih the idea of snakes, though with the exception of 

 a few water snakes most animals of this kind seem to pre- 

 fer dry and open places. However, Microstylis monophyllos 

 is the "adder's mouth" or "white adder's mouth" while 

 Pogonia ophioglossoides is the "adder's-mouth pogonia," and 

 "snake-mouth," while its specific name indicates that it is 

 the "snake-tongue" as well. Its most attractive title is "rose 

 pogonia." The "whorled snake-mouth" is Pogonia vcrticil- 

 lata. This unobtrusive plant, whose leaves in a circle at the 

 top of the stem simulates the Indian cucumber root {Medc- 

 ola), is more commonly known as "whorled pogonia," while 

 the "small whorled pogonia" is P. ajfinis, and the "ncxlding 

 pogonia" P. trianthophora. This latter is also called "three 

 birds" but it rec[uires a lively imagination to see any resem- 

 blance to birds in the small pale rose-colored flowers; nor 

 for that matter can anybody discern much of a resemblance 

 to a serpent's mouth in any of the forms that allude to it. 



Arctlutsa bulbosa, larger and handsomer than the other 

 species mentioned in connection with reptiles, is the "dragon's 

 mouth." It is also called "wild pink" but "arethusa" is still 

 its commonest common name. The showy Calopogon pid- 

 chcllus is "swamp pink" and "grass pink," the latter being 

 most frequently used. The books occasionally call it 

 "meadow gift" but this is merely a translation of the generic 

 name Limodornm under which it is sometimes listed. The 



