APPENDIX I 451 



c. — Sympetaly constant ; stamens in one whorl ; carpels 

 2, united throughout ; frequently zygomorphic. 



Order 5. Tubiflor^. — Flowers typically with 

 4 isomerous whorls, or with gynoecium reduced, 

 or if zygomorphic, androecium also ; stamens epi- 

 petalous. 



Sub-Order i. Convolvuline^. — Flowers usually 

 actinomorphic ; ovules few, micropyle facing downwards ; 

 fruit rarely separating into nutlets. 



Family i. Convolvulacese (Vol. Ill, p. 122). — 

 Flowers 5-4-partite ; corolla valvate in bud ; stamens 5 ; 

 carpels (2) ; ovary 2-locular ; ovules 2, basal, erect ; style 

 2-branched ; fruit a capsule. 



Sub-Family i. Convolvuloideae. 

 Tribe. Convolvulece. 



Gefiera. Convolvulus (Vol. Ill, p. 123), Caly- 

 sUgia. 

 Sub-Family 2. Cuscutoidese. 



Gefius. Cuscuta (Vol. Ill, p. 125). 

 Family 2. Polemoniacese (Vol. Ill, p. 109). — 

 Flowers usually actinomorphic, 5-partite ; carpels (3) ; 

 ovules usually indefinite; style i, trifid ; fruit a capsule, 

 loculicidal. 



Sub-Family. Polemonioideae. 

 Tribe. Polemoniece. 



Genus. Polemo7iium (Vol. Ill, p. no). 

 Sub-Order 2. BoRRAcmiNEyE. — Like Convolvulineae 

 but micropyle facing upwards ; fruit often separating into 

 nutlets. 



Family 3. Borraginaceae (Vol. II, p. 112). — Flowers 

 in cincinni, usually zygomorphic, 5-partite ; ovary deeply 

 5-lobed, 4-locular by false septa ; carpels (2) ; ovules 2, 



