to the Genera.} VI.—HEXANDRIA. 75 
"{Spikelets crowded in ae heads [p. 74] 
. Cephalostachyum. 
+Palez 0, or, if present, cae tnt i—[p. 74] 
Spikelets very minute; fruit small...1123. Dinochloa. 
Spikelets conspicuous; fruit very large 
4. Melocanna. 
*Flowers not enclosed in imbricating glumes ; ovary rarely 
1-locular and never 1-ovuled ; leaves without a ligule ; perianth 
always present, and either calycine or petaloid or both ; fruit 
never a grain :—[p. 74 
Carpels free 
Flowers in spikes ; perianth-segments petaloid, 1-seriate, 
irregular in shape and 1-3 in number ; fruit of 3 follicles 
. Ap 
Flowers in umbellate or isa whorls ; perianth-seg- 
ments regular 2-seriate, 3 outer agrees 3 inner 
petaloid ; fruit of 6 or more achen 
Flowers all 2-sexual 1015. Alisma. 
Flowers polygamo stl ennenia S00 
Carpels connate in a 3- ‘eine: rarely : soe ovary :— 
Perianth 2-seriate, the 3 outer segments calycine, the 
3 inner petaloid :— 
Petals connate below in a tube............ 977. Cyanotis. 
Petals fre 
Camas s 3- :isiahes 878. Forrestia. 
Capsule 2-locular 979. Floscopa. 
nage of 6 1-seriate segments, or if in 2 series of 
each the segments of both series similar :-— 
"Pera sgment small calycine :— 
up Fruit 3-valved — grassy herbs with cea 
beslen 6 r terete lea 981. Jun 
rita indehiscent ; eakabase shrubs with sistas 
leaves ending in a tendril............ 980. Flagellaria. 
Pellet: apical all petaloid :— 
{Perianth-segments tle below in a distinct tube; 
stamens adnate to the corolla :—([p 
stout herbs or shrubs; flowers spicate :—[p. 76] 
ttPericarp membranous, deliquescent ; seeds 
ripening outside the pericarp ; each cell of 
ovary l-ovuled [p. 76]......... 947. Sanse 
