LXli LINNAEAN ARRANGEMENT. 



DIPSACUS. Flowers in involucrate ovoid heads: Florets involucel- 

 late. Calyx cup-shaped, entire. Corolla tubular, with 4 erect 

 lobes. Fruit akene-like, 1-seeded. Receptacle chaffy. ORD. L. 

 DIPSACEAE. p. 120. 



GALIUM. Calyx-teeth obsolete. Corolla rotate, 4-(rarely 3-) parted. 

 Styles short, bifid. Fruit didymous, roundish, dry or fleshy, smooth 

 or hispid, 2-seeded. ORD. XLVIII. RUBIACEAE. p. 116. 



DIODIA. Calyx 2- or 4-toothed. Corolla funnel-form ; limb 4-lobed. 

 Fruit quadrangular-obovoid, splitting into 2, dry, 1-seeded carpels. 

 ORD. XLVIII. RUBIACEAE. p. 118. 



HEDYOTIS. Calyx 4-lobed. Corolla .tubular ; limb 4-parted. CapsuU 

 half superior, 2-celled, many-seeded, opening at apex across the 

 dissepiment. ORD. XLVIII. RUBIACEAE. p. 119. 



MITCHELLA. Calyx 4-toothed. Corolla funnel-form ; limb 4-parted, 

 villous on the inner side. Berry didymous, 4-seeded. ORD. XLVIII. 

 RUBIACEAE. p. 119. 



SANGUISORBA. Calyx corolla-like, 4-lobed, 3-bracted; tube4-angled. 

 Corolla none. Fruit an akene (rarely 2), included in the winged 

 calyx-tube. ORD. XXXV. ROSACEAE. p. 76. 



b. Corolla tetrapetalous, or none. 



CORNUS. Calyx minutely 4-toothed. Petals oblong, spreading. 

 Drupes berry-like, distinct; nut 2 or 3-celled. ORD. XLVI. 



CORNACEAE. p. 110. 



LUDWIGIA. Calyx-lobes 4, persistent. Petals sometimes want- 

 ing. Capsule quadrangular-obovoid, 4-celled, many-seeded. ORD. 

 XXXVIII. ONAGRACEAE. p. 89. 



B. OVARY SUPERIOR, a. Flowers complete. 



PLANTAGO. Calyx of 4 persistent sepals, slightly connected at base. 

 Corolla tubular, with 4 reflexed lobes, marcescent. Capsule ovoid, 

 2-celled, circumscissed. ORD. LVII. PLANTAGINACEAE. p. 176. 



BARTONIA. Calyx 4-parted. Corolla 4-parted. Stigma 2-lobed, 

 decurrent on the style. Capsule oblong, 1-celled, 2-valved. ORD. 

 LXXI. GENTIANACEAE. p. 230. 



OBOLARIA. Calyx of 2 spatulate leaf -like sepals. Corolla tubular, 

 4-lobed, marcescent. Stamens in the clefts of the corolla. Capsule 

 ovoid, 1- (or imperfectly 2-) celled, 2-valved. ORD. LXXI. GEN- 

 TIANACEAE. p. 232. 



AMMANNIA. Calyx 4-angled, 4-lobed, with a tooth at each cleft. 

 Petals 4, or wanting. Capsule globular, 4- (or finally 1-) celled, 

 many-seeded. ORD. XXXVII. LYTHRACEAE. p. 87. 



b. Flowers incomplete. 



SYMPLOCARPUS. Spathe conch-shaped, acuminate. Spadix roundish- 

 oval, covered with florets. Calyx deeply 4-parted, persistent. Ovary 

 immersed in the receptacle. Seed solitary. ORD. XCIX. ARACEAE. 

 p. 298. 



