FICOIDE^. 65 



1. MAMILIiARIA, Haworth. 

 1. M. Goodridgii, Scheer. Petals about 8, ovate, awned, dull yellowish. S. CaL 



2. ECHINOCACTTJS, Link & Otto. 

 1. E. viridescens, Nutt. Sepals and petals numerous, greenish: fruit scaly. S. CaL 



3. CEREUS, Haworth. 

 1. C. Emoryi, Engelm. Flowers greenish yellow: fruit subglobose, spiny. S. Cal. 



4. OPUNTIA, Toumefort. 



Joints much flattened, obovate: fruit juicy .• 1, 2 



Joints cylindrical: fruit green, fleshy: flowers red 3 



1 . 0. Engelmanni, Salm. Flowers yellow, 3 inches long. Santa Barbara, S. 



•J. O. Ficus-Indica, Mill. Fruit delicious. The Prickly Pear. 



3. 0. prolifera, Engelm. Tree-like with spiny tubercles. San Diego. 



FICOIDEJ;. 



Ovary inferior: petals and stamens numerous: very fleshy. 1 



Ovary superior: petals none: leaves opposite or whorled. 



Calyx-lobes 5, petaloid: stamens many: succulent 2 



Sepals 5, greenish: stamens 3 to 10: styles 3: not succulent 3 



1. MESEMBBYANTHEMUM:, Linnceus. 



1 . M. equilateral©, Haworth. Leaves equally 3-sided, very thick, opposite. 



2. M. coccineum, Haw. Leaves semi-cylindrical, a line broad. 



3. M. crystallinum, L. Leaves flat, covered with glistening papillae. 



2. SESUVITJM, Linnaeus. 

 1. S. PortTilacastrum, L. Calyx 3 to 5 lines long, more or lels purplish. 



3. MOLLUGO, L. 



1. M. verticillata, L. Slender: leaves spatulate: flowers fascicled, axillary. 



UMBELLIFER^. 



Herbs with usually hollow stems, sheathing petioles and small flowers in simple or 

 10 



