134 xc. CONVOLVULACE.E (baker and rexdle). [Ipomcea. 



Leaves oblong, up to 1^ in. broad . 105. /. prismatosypJion. 



Leaves ovate-suborbicular, over 3 in. broad 106. 1. magnified. 

 Leaves cordate-ovate, up to nearly 5 in. 



broad ...... 107. /. macrocalyx. 



Leaves broadly-ovate, stalk as longasblade 110. /. macro-siphon. 

 Sepals glabrous. 



Leaves elliptic with retuse base . . 10S. I. Haniiingtonii. 



Leaves lanceolate with wedge-shaped base 109. /. dammeriana. 

 Sepals about 6 lin. long. 

 Corolla about 3 in. long. 

 Flowers solitary or in a simple diehasia. 



Leaves cordate-oblong. Bracts narrow 111. _Z". verbascoidea. 

 Leaves suborbicular to ovate, base 



shallowly cordate . . . 112. I. dammarana. 



Leaves elliptic-oblong with broadly 



rounder or subtruncate base . 113. I. Bakeri. 



Leaves broadly oval, base cordate. 



Bracts large .... 114. /. liikafuensis. 



Flowers in a lax cyme. 



Leaves broadly elliptical with subcor- 



cordate base .... 115. I. Wakefieldii. 



Leaves ovate, base subtruncate, bullate 

 on upper face .... 



Leaves deeply cordate 

 Cymes dichotomous, many-flowered. 

 Leaves cordate-ovate 

 Corolla about lg- in. long. 



Bracts large and persistent . 

 Bracts small. 



Flowers springing from the same point 120. 

 Flowers in lax cymes . 

 Flowers usually solitary 

 Sepals 3-4 lin. long. 

 Leaves entire. 



Sepals not markedly unequal. 



Flowers few to many. Sepals ovate- 

 lanceolate ..... 123. /. lilacina. 



Peduncle short, 1-2-flowered. Sepals 



oblong ..... 124. I. Jiiemiana. 



Two inner sepals conspicuously larger 

 than the 3 outer. 

 Bracts subfoliaceous, 3-4 lin. long . 125. /. Holubii. 

 Bracts small, 1^ lin. or less . . 126. /. rhodesiana. 



Sepals accrescent, spreading in fruit . 127. /. shirensis. 

 Leaves palmatifid ..... 128. 1. digitata. 



ff Corolla hypocrateriform. 

 Leaves entire. 



Sepals |--1 in. long. 



Sepals nearly 1 in. Corolla-tube about 



3i in. long 129. /. marmorata. 



Sepals | in. Corolla-tube about 2| in. long 130. /. grandiflora. 

 Sepals 4-6 lin. long. 



Corolla-tube about 2| in. long . . . 131. /. lapidosa. 



Corolla-tube 3A-4 in. long. Filaments 



included 132. J. longituba. 



116. 



/. Grantii. 



117. 



I. Buclianani. 



118. 



I. pringsheimiana 



119. 



I. citrina. 



120. 



I. brasseuriana. 



121. 



I. shir ambe mis. 



122. 



I. gassy pin a. 



