368 AUTUMN FLOWERS AND FRUITS. 



23. Eriocaulaceons Plants. Eriocaulace^e. 



(48; Eriocaulon — barren flowers central, the perianth 4-6-cleft, 

 its inner segments united nearly to the summit ; stamens 

 4-6 : fertile flowers in the circumference, the perigone 

 deeply four-parted ; stigmas 2-3. 



24. Graminaceous Plants. Graminace.e. 



(49) Leersia — panicle loose; spikslets one-flowered, consisting 



of only two keeled glumes. 



(50) Cynodon — panicle digitate ; spikelets one-sided,one-flowered, 



attached to a flat rachis ; glumes two, keeled, nearly equal ; 

 pales two, keeled, tlie upper enwrapped by the lower. 



(51) Poa — panicle loose ; spikelets two- or many-flowered, ovate ; 



glumes two, rather unequal, usually keeled; pales two, 

 nearly equal, awnless, scarious at the top. 



(52) Molinia — panicle contracted, elongate; spikelets two- or 



many-flowered, lanceolate ; glumes two, acute, unequal ; 

 pales two, nearly equal, awnless. 



[III.— SPECIES AND VARIETIES.] 



(1) Eanimciilus. Crowfoot. 



* Leaves smooth. 



R. sceleratus : annual ; stems 1-2 feet high ; lower leaves 

 broad, stalked, tripartite, the segments blunt crenate, upper 

 leaves trifid, inciso-dentate ; flowers very small, pale yellow. 

 — By ditches and ponds. Fl. June to September. 

 ** Leaves hairy. 



R. hirsutus : annual; stems 4-18 inches high; radical 

 leaves with three stalked, trifid, and cut leaflets, peduncles 



