42 SPUING FLOWERS. 



(115) Anthoxantlmm spikelets oiie-flowered (*". e. one perfect 



flower, and two neuter ones consisting of empty pales) 

 pales of the neuter flowers awned ; stamens two. 



** Inflorescence lax, spike-like, one-sided. 



(116) Chamsegrostis glumes two ; pales membranous, awnless. 



*** Inflorescence lax, panicled. 



(117) Aira spikelets two-flowered ; pales awned, the awn scarcely 



protruding beyond the glumes. 



(118) Poa spikelets three- or more flowered ; glumes shorter 



than the spikelets ; pales awnless, keeled at the back. 



[III. SPECIES AND YAEIETIES.] 



* # * The numbers in parentheses correspond with those in the foregoing list. 



(1) Anemone. 



* Sepals covered outside with silky hairs. 

 A. Pulsatilla : flowers large, solitary, violet-purple, with the 

 involucre deeply cut into linear segments ; carpels with feathery 

 tails. Pasque-flower. Limestone pastures. Fl. April, May. 



** Sepals smooth on both sides. 



A. nemorosa : flowers small, solitary, white tinged with red 

 outside ; the involucre of stalked leaves, with the leaflets lobed 

 and cut; carpels downy with a point not feathery. Wood 

 Anemone. Woods and thickets. Fl. April. 



(2) Myosums. MOUSETAIL. 



M. minimus : annual, dwarf; radical leaves linear ; flowers 

 solitary, small, greenish; receptacle becoming much elon- 

 gated. Damp sandy or gravelly fields. Fl. May, June. 



