TYPHACBA&ARACE& 303 



Order LXXXIV. TYPHACE^E (Cat-tail Family). 



Herbs of marshes and ditches. Stems without joints. Leaves 

 rigid. Flowers monoecious, arranged in a spadix, which is desti- 

 tute of a spathe, or in globose heads. Perianth of 3 sepals, or 

 none. Stamens 3-6, with long and slender filaments, and cunei- 

 form anthers. Ovary free from the perianth, I -celled, i -seeded. 

 Stigmas 1-2. Fruit a utricle. 



( Flowers in heads Sparganium. 

 TYPHACE^E.^ 



( Flowers in spikes Typha. 



1. Typha. Flowers in a long, terminal, cylindrical spike, upper 

 part staminate. Stamens intermingled with hairs, with 3 anthers on a 

 common filament. Ovaries below, surrounded by numerous bristles. 2f 



T. LATIFOLIA (Cat-tail}. Stem erect, simple ; rhizoma creeping ; leaves 

 ensiform, nearly flat ; barren and fertile spikes contiguous, mostly forming 

 one long, compact, cylindrical spike, turning brownish in fruit. Common 

 in swamps, 3-5 feet high. July. 



2. Sparganium. Flowers in separate, globose heads, with leafy 

 bracts ; upper ones barren scales ; lower fertile ; ovaries surrounded by 

 3-6 calyx-like scales. Fruit turbinate, i-2-celled, i-2-seeded. % 



S. EURYCARPUM (Burr-reed). Stem erect, branching above ; leaves lin- 

 ear, triangular at base, with concave sides ; flowers in globular clusters, re- 

 sembling burrs, of a whitish green, lowest mostly pedicellate ; stigma linear, 

 longer than the style, often 2. Around ponds and in ditches. July-Au- 

 gust. 



Order LXXXV. ARACE^E (Arum Family}. 



Herbs, or tropical shrubs, with a fleshy rhizoma or corm. 

 Leaves sheathing at base, simple or compound, sometimes with 

 more or less reticulated veins. Flowers usually sessile in a termi- 

 nal or lateral spadix, sometimes monoecious ; sometimes perfect 

 with a perianth of 4-6 sepals. Stamens definite in the perfect 

 flowers, 4-6, usually indefinite in the monoecious flowers. Ovary 

 free from the perianth, I -several-celled. Seeds solitary, or sev- 

 eral. Fruit usually a proper berry, sometimes dry. 



Leaves with f 

 expanded 

 blade 



,owers without Leaves compound-^ ris*,na. 



lowers wiinout 



calyx and corolla j -- Leaves 



[ simple- | Leavescordate 

 Flowers with peiianth Symplocarpus. 



-Calla. 



Leaves linear Acorns. 



