ORDKR 63. UMBELLIFER^J. 



3. PHYLLOCACTUS PHYLLANTIIOIDKS. Stock consisting of narrow, 

 3ii!*iforin, crenate joints, fleshy but leaf-like. Flowers 4' long, open by day, with many 

 rose-colored petals and sepals longer than the tube, gradually spreading. Mexico. 



2 I". ACKERMAXNI. Fls. scarlet ; pet. channelled, pointed, very many, 3 4'. Mexico. 



3 P. riiTLLANTiius. Spleemcort. Joints ensiform, serrate ; fla. 9 12', the white fun- 



nel-form cor. much shorter than the slender tube, opening by night, fragrant. S. Am. 



4. CEREUS, DC. Sep. and pet. imbricated, adnate to and prolonged 

 into a long tube above the ovary. Sta. and style filiform, adnate to ll'tj 

 tube. Stig. 10. Berry scaly with the remains of the sepals. J> Stocis 

 fleshy, green, prismatic, often jointed, with fascicles of spines on the ridges. 



1 C. ORANDipLORtrs. Night-blooming C. Stock long, about 5-angled ; flowers very large, 



nocturnal; pet. spreading 68 ', pearl-white; sep. yellow. Mex. A magnificent flower. 



2 C. TRIANGULARIS. Stock 3-angled, prickles bristly ; fl. very large, white; sep. greet,. 



3 C. FLAGELLir6RMis. Stock slender, long, prostrate, 10-angled, hispid ; fls. pink-coir.-, 



smaller, open by day many days in succession ; tube longer than the petals. 



4 C. SERPENTINUS. Stock 12-angled, 4f ; spines white, bristly ; fls. pale, open by night. 



5 C. spECiosissiMus. Stock 3- or 4-anglerl, erect, 4f ; angles winged, undulate ; fls. large 



(4' long), with many red or crimson petals and white stamens, diurnal. Common. 



6 C. SENILIS. Old-Man C. Stk. erect, oblong, with tufts of long, white, hair-like bristles. 



5. MELOOACTUS COMMUNIS. Stock very succulent, roundish ovate, 

 If. 12-18-ribbed, surmounted by a sort of spadix, consisting mostly of dense wool, in 

 which at the top the small red flowers are imbedded. W. Indies. 



ORDER LXI. PICOIDEJE. MESEMBBYANTHS. 



Plants fleshy, of forms variously singular, with entire, mostly opposite 

 leaves, and solitary, regular flowers, remarkable for their profusion and 

 duration. Calyx lobes 4 or 5. Petals GO 5, or rarely 0. Stamens GO, dis- 

 tinct, perigynous. Ovary more or less adherent. Stigmas 2 GO. Cap- 

 sules 1- Go-celled, co-seeded. Embryo curved. 



Petals and stamens 00, in several rows. Capsule fleshy, valvate MESEMBRYANTHEMUM. J 



$ Petals none, stamens CO 5. Capsule 3-5-celled, circumsessile SESUVIUM. .2 (& p. 446) 



1. MESEMBRYANTHEMUM, L. ICE PLANT. Calyx lobes 5. PeL 

 linear, inserted with the filiform stamens on the calyx tube. U b Air bub- 

 bles beneath the epidermis appear like dew or frost. 



1 Itt. CRTSTAI.UNUM. Procumbent, fleshy ; 1 vs. large, ovate, acute, wavy at the mnrgiu, 



3-veined beneath. ~u Greece. Stem If. Flowers white, all summer. Not hardy. 

 tf M. GRANDIFLOUUM. Procumb. ; Ivs. cord, ovate ; cal. 4-cleft, 2-horned ; pet. pink. Afr. 



2. SESUVIUM, L. SEA PURSLANE. Sep. 5, united at base, colored 

 tnside. Sta. 5 50, inserted on the calyx tube. Ov. free, 3-5-celled. Sly. 

 8 5. Pyxis opening transversely by a lid. y Prostrate sea-side herbs. 



B. Portulacnstrnin Tourn. Lvs. linear-spatulate ; fls. on short peduncles ; sta. rj-_ 

 Sandy coasts, N. C. to Fla. If + . Plant very smooth and fleshy. Fls. axil., roseate. Jl.-f. 



ORDEK LXIII. UMBELLIFER^E. UMBELWORTS. 

 Herbs with hollow, striate stems, sheathing petioles, and flowe.s in um 



