Third, fourth class. 
7 
74 Achenes surrounded by long hairs (hypog. bristles) forming 
a cottony tuft ..... Eriophorum. 606. 
— Achenes without these hypog. hairs, or with them shorter 
than the glumellas ....... 75 
75. Lower glumellas shorter than the upper (stem leafy) 76 
— Lower glumellas not shorter than the upper . . 77 
76. Leaf margins coarsely denticulate. Stem 10 dm and more 
Cladium. 601. 
— Leaf-margins less coarse, not denticulate. Stem 2—4 dm 
Rhynchospora. 602. 
77. Style filiform, inarticulate, deciduous 
— Style dilated at the base, persistent 
78. Spikelets solitary, terminal 
— Spikelets several .... 
79 (1). Cor. gamopetalous, 5-partite, one of the divisions reaching 
to the base. Seps 2. .... Montia. 199. 
— Pets 3 ..... 
— Pets 5. Ls opp. or in whorls of 4 
80. Ls whorled ..... 
— Ls opposite ..... 
81. Caps 3-valved. Ls with scarious stipules Polycarpon. 
— Caps opening by 6 teeth. Ls exstipulate 
82. Pets denticulate at the top . . . Holosteum. 108. 
— Pets 2-partite. Stellaria. 109. 
Scirpus. 604. 
. 78 
Heleocharis. 603. 
Fimbristylis 605. 
Elodea. 
Elatine. 
80 
81 
526. 
112 . 
204. 
82 
Cl. 4. Tetrandria. 
1. Ls in whorls of 4—12 (Stellatce) . ... 2 
— Ls never all whorled, sometimes 0 at the time of flower¬ 
ing .......... 5 
2. Cor. stellate, rotate or flat campanulate ... 3 
— Cor. infundibuliform or infundibuliform-campanulate (the 
tube distinct, often long) ...... 4: 
3. Fr. succulent. Stig clavate . . . Rubia. 276. 
— Fr. dry. Stig capitate .... Galium. 277. 
4. Cal.-limb distinct, with 6 teeth, persist, on the fr. 
Sherardia. 274. 
— Cal.-limb with 4 teeth, or indistinct, disappearing 
the fr. ..... 
5 (1). Ligneous pis ... 
— Herbs or suffrutescent pis 
6. Styles 2. Cor. 0 
— Styles 4. Cor. deeply 4-partite, white 
— Style 1. 
7. Pets superior, white or yellow 
— Pets inf., greenish .... 
8. Stas opp. the pets. Drupe 
— Stas altern. with the pets. Fr. capsular 
on 
Asperula. 275. 
6 
O 
Ulmus. 508. 
. Ilex. 376. 
7 
Cornus. 267. 
8 
Rhamnus. 130. 
Evonymus. 129. 
