Key 



27 



Page 



(1) Branches zigzag . , Colubrina — 131 



(2) Branches not zigzag Adelia — 159 



(y) Plants with creeping stems .Isnardia — 146 



(z) Plants neither shrubs nor 



vines. 



1. Petals none. (In Paronychia 

 sepals are petal-like). 



(1) Sap milky . . Poinsettia— 125 



(2) Sap not milky Paronychia, — 72 



2. Petals or lobes of corolla 4. 



r. Leaves in whorls of 4 or 7 Galium — 199 



s. Leaves not in whorls. 



(m) Leaves small, fleshy Sedum — 89 



(n) Leaves neither small 

 nor fleshy. 



(1) Flowers in flat-top- 

 ped clusters Lantana— 180 



(2) Flowers solitary and 



axillary Mercardania—192 



3. Petals or lobes of corolla 5, 



sometimes 6. 



r. Sap milky Asclepias— 162-3 



s. Sap not milky. 



(m) Petals distinct or near- 

 ly so. 



(x) Leaves fleshy Sedum — 89 



(y) Leaves not fleshy . . . 



(1) Buds red, stamens 2 Menodora — 158 



(2) Stamens 5 Linum— 112-3 



(3) Stamens 10 Thryallis— 117 



(n) Petals united at base. 



(x) Flowers clustered Lantana— 180 



(y) Flowers not clustered. 



(a) Corolla saucer- 

 shaped. 



(1) Pods inflated like 



a bladder Physalis — 170 



(2) Pods not inflated .. Chamaesaracha — 170 



(b) Corolla not saucer- 

 shaped Mercardonia — 192 



b. Flowers green, 

 m. Sap milky. 



