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LINN^AN METHOD. 



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ASS IV. TETRANDEIA. 4 stamens equal in height 



Ord. I. MoNOGTKiA. 1 style. 



Perianth double. Corolla monopetalous, superior, 



1. DIPSACACE-^. Flowers capitate, within a common involucre 



Calyx double : one cup-shaped or membranaceous, the other 

 minute or of bristles. Fruit 1-seeded. — 



2. EUBIACE^. 



the margin. 



- - p. 202. 



Flowers solitary. Calyx entire or toothed at 

 Fruit 2-seeded — Leaves whorled. p. 194. 



** Perianth double. Corolla monopetalous, inferior. Seeds 2 or more. 



i Germen deephj 4:-lobed. Style from between the lobes. Fruit splitting 



into 4 achenes. 



3. LABIATJ5. Cal. 4-clcft. Cor. coloured, p. 315. 

 ft Germen or fruit of one 



Style terminal. 



4. GENTIANACE^ 



5. 



6. 



Cal. 4-clcft. Cor. coloured. Stamens 

 shorter than the corolla, alternate with its lobes. Caps 

 1-celled, 2-valYed at the apex. p. 274. 



Plantago. Cal. of 4 pieces. Cor. scarious, the segments re- 

 flexed. Stam. much longer than the corolla. Capg. 2-ceIled, 

 bursting all round transversely, p. 347, 



Centunculus. Cal. 4-partite. Cor. coloured. Stam. shorter 

 than the corolla, opposite to its lobes. Caps. 1-celled, bursting 

 all round transversely, p. 343. 



*** Perianth double. 



'/ 





8. 



9. 



10. 



Epimedium. Cal. of 4 leaves. Pet. inferior, with an inflated 



nectary on the upper side. Stam. opposite to the petals, 

 p. 14. 



CEUCIFER^. Cal. of 4. leaves. Pet. inferior, without a 



nectary. Stam. opposite to the petals, p. 21. 

 Etjontmus. Cal. 4-cleft, with a flat disk lining the base inside. 



Petals perigynous, inserted into the margin of the disk. 



Stam. alternate with the petals. Germen 3— 4-celled. p. 9 1 . 

 CoKNus. Cal. of 4 teeth. Pet. without a nectary, superior. 



Germen 2 -celled, p. 191. 



**** 



Perianth single. 



10^ Maianthemum. Perianth inferior, petaloid, 4-partite. Stamens 



inserted into the base of the segments of the perianth, and op- 



1 In some of the genera, especiaUy Galium, the calvx forms so small a rim or 



margin to the germen as to be scarcely visible, its tubular part being incorporated 

 with the germen. ■ ® ^ 



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