xliv CLASSES, DIVSIONS, AND OKDBKS. 



88. lAliacem. Periautli petal-like. Stam. 6 ; anth. 

 bursting inwards. Fr. a dry capsule. — ^Bulbous or with 

 root of fleshy fibres in Simethis S"-'- 



89. Melanthacem. Perianth subherbaceous or petal-like. 

 Stam. 6 ; anth. versatile from below their middle. Fr. of 

 3 foUioles slightly connected or a S-celled capsule.— 

 Tuberous, or with a creeping rhizome 367 



90. JvmeacecB. Perianth of glumelike scarious seg- 

 ments. Stam. usually 6; anth. innate. Fr. capsular, 

 3-valved, loculicidal. — Eushes 368 



91. EriocaulacecB. Perianth membranous, of 4 — 5 parts. 

 Stam. 4 — 6 ; anth. attached by back. Fr. capsular, mem- 

 branous, 2 — 3-celled, loculicidal. — Aquatic plants. L. 

 tufted. Fl. in heads on naked stalks 375 



**** Perianth wanting in our plants, or of 4 small 

 scalelike parts. 



92. Typhacets. Monoecious. Fl. closely packed in cy- 

 lindrical spikes, or in dense globose clusters, the males 

 uppermost. Fr. dry or spongy. — Water-plants 375 



93. Aracees. Monoecious with the male fl. uppermost, 

 or perfect, on a spadi.x and usually in a spath. Fr. suc- 

 culent. — Spath usually conspicuous. L. often net^veined. 377 



94. Lemnacecs. Monoecious. Fl. 2 in a spath (very 

 rare). — Small, floating, green, leaflike, proliferous 378 



95. PotamogetonaceeB. Fl. perfect or monoecious, in 

 small spikes or clusters. No spath. Ovaries 4 ; stig. 1, 

 sessile, subcapitate.— Aquatic plants 379 



96. NaiadacecB. Mon- or di-oecious. Fl. solitary in a 

 spath. Ovary 1. Style 1 ; stig. filiform. — ^Aquatic 

 plants with linear leaves 386 



Divisions. GLUMIFEE^. 



97. Oyperacece. Anth. entire at the end, innate. Leaf- 

 sheaths entire. — Sedges 387 



98. Qraminem. Anth. notched at both ends, versatile. 

 Leaf-sheaths split. — Grasses 412 



