CLASSIFICATION. 703 



1194. Order Arales. (See Chapter LX.) 



The arum family (Araceae). Flowers in a fleshy spadix. Ex- 

 amples: Indian turnip (Arisaema), sweet-flag (Acorus), skunk- 

 cabbage (Spathyema). 



The duckweed family (Lemnaceae). (Examples: Lemna, 

 Spirodela, Wolfna. See paragraphs 51-53.) 



1195. Order Xyridales, from the genus Xyris, the yellow- 

 eyed grass family (Xyridaceae). Species mostly tropical, but 

 a few in North America. Other examples are the pipewort 

 family (Eriocaulaceae, example, Eriocaulon septangulare) , the 

 pineapple family (Bromeliaceae, example, the pineapple culti- 

 vated in Florida) ; the Florida moss or hanging moss (Tillandsia 

 usneoides) ; the spiderwort family (Commelinaceae), including 

 the spiderwort (Tradescantia, several species in North America) ; 

 the pickerel- weed family (Pontederiaceae) , including the genus 

 Pontederia in borders of ponds and streams. 



1196. Order Liliales. (See Chapter LIX). Some of the 

 families are as follows: 



The rush family (Juncaceae, example, Juncus), with many 

 species, plants of usually swamp habit. 



The lily family (Liliaceae, examples: Lilium, Allium = Onion, 

 Erythronium, Yucca). 



The iris family (Iridaceae, examples: Iris, the blue-flag, 

 fleur-de-lis, etc.). 



The lily-of-the-valley family (Convallariaceae, examples: lily- 

 of-the-valley, Trillium, etc.) 



The amaryllis family (Amaryllidaceae, examples: Narcissus, 

 the daffodil; Cooperia, in southwestern United States). 



1197. Order Scitaminales. This order includes the large 

 showy cultivated Canna of the canna family. 



1198. Order Orchidales. Example, the orchid family (Orchi- 

 daceae, see Chapter LIX) with Cypripedium, Orchis, etc. 



