144 COMMON CANADIAN WILD PLANTS 



1. ARIS-iE'MA, Martins. INDIAN TURNIP. 



1. A.triphyTllim,Torr. (!NI>IAN Tri:Mi-.) K(,r full descrip- 

 tion and engraving of this plant see Part I., sections 04 !)7. 



2. A. Dracontium,Schott., (GREEN DRAGON) is reported from 

 low grounds near London, Out. Leaf usually solitary, pedately 

 divided into 7-11 oblong-lanceolate pointed leaflets. Sj.athc 

 convolute, pointed ; the slender point of the spadix extending 

 beyond it. 



r-J. C \LJ,A, L. WATER AKUM. 



C. palustris, L. (MARSH CALLA.) This plant is fully de- 

 scribed and illustrated in Tart I., section 98. 



3. SYMPIX?C AR'PUS, Salisb. SKUNK CABIIAGK. 



S. foe'tiduS, Salisb. Leaves 1-2 feet long, ovate or heart- 

 shaped, short-petioled. Spathe purplish and yellowish, incurved. 

 Plant with skunk-like odour. Bogs and wet places ; not com- 

 mon northward. 



4. AC'ORUS, L. SWEET FLAG. CALAMUS. 



A. Cal'amus, L. Scape much prolonged beyond the spadix. 

 Swamps and \vet places. 



ORDER XCI. LEMNA'CEJE. (DUCKWEED FAMILY.) 



Very small plants floating about freely on the surface of ponds 

 and ditches, consisting merely of a little frond with a single root 

 or a tuft of roots from the lower surface, and producing minute 

 monoecious flowers from a cleft in the edge of the frond. The 

 flowers are rarely to be seen. The commonest representative 

 with us is 

 Leimia polyrrhi'za, consisting of little roundish green fronds (purplish 



hencath) about \ of an inch across, and with a cluster of little roots 



from the under surface. 

 L. minor is also found. Root sinyle. 



ORDER XCII. TYPHA'CEJE. (CAT-TAIL FAMILY.) 



Aquatic or marsh herbs with linear sword -shaped leaves, erect 

 or floating, and mono-cious llowers, cither in separate heads or 

 <ni different parts of the same spike or spadix, but without a 

 spathe and destitute of true floral envelopes. Fruit an achene, 

 1 -seeded. 



