352 TRA.NS. ST. LOUIS ACAD. SCIENCE. 



2. Pachystima. — ^'lowers hermaphrodite, 4-merous; calyx shallow; 

 filaments longer than the round anthers ; style short, at length commonly 

 unilateral; stigma capitate; ovary nearly immersed in the disk, 2-celled, 

 with a pair of erect ovules in each cell; capsule oblong, 2-edged, usually 

 i-seeded and inequilateral by abortion, tardily loculicidal ; seed with a pale 

 lacerate aril at base. 



* * Leaves alternate; fruit dehiscent. — § Celastrece. 



3. Celastrus. — Flowers subdioecious, 5-merous; calyx cup-shaped; 

 filaments longer than the oval mucronate anthers: style short, terminal, 

 slightly 3-lobed; ovary free, usually 3-celled, with a pair of erect ovules 

 in each cell; capsule orange, more or less completely 3- to 4-celled, with 

 usually a single seed in each cell; seed enclosed in a red aril. 



4. Maytenus. — Flowers polygamo-dioecious ; calyx shallow; filaments 

 longer than the round-cordate anthers; ovary confluent with the disk be- 

 low, narrowed to the slightly lobed stigma, usually 3- or 4-celled, with an 

 erect ovule in each cell; capsule obovoid, triquetrous, imperfectly 3- to 4- 

 celled and as many seeded; seeds v/ith a red aril open above. 



* * * Leaves alternate or opposite ; fruit indehiscent. — § El<eodendre(e. 



5. Myginda. — Flowers hermaphrodite, 4- or 5- merous ; calyx shallow 

 cup-shaped; filaments thrice as long as the round anthers; style short 

 and terminal, or elongated and then commonly unilateral; ovary partly 

 immersed in the disk, i- to 4-celled. 



6. ScH^EFFERiA. — Flowcrs dioecious, 4-merous; calyx shallow; disk 

 small; filaments thrice as long as the round-oval anthers; style terminal ; 

 stigma 2-cleft, with large incised or fimbriate divisions ; ovary free, 2- 

 celled, with an erect ovule in each cell; drupe spheroidal, compressed or 

 grooved when immature, 2-celled; seeds not arillate. 



7. iSIoRTONiA. — Flowers hermaphrodite, 5-merous and symmetrical; 

 calyx obconic; filaments thrice as long as the subglobose mucronulate an- 

 thers; style terminal, 5'-lobed; ovary free from the crenulate disk, 5-celled, 

 with a pair of erect ovules in each cell ; fruit oblong, fluted, dry, i-celled 

 by abortion; seed solitary, filling the ovary, not arillate. 



Tribe II. IIippocrate.c — Stamens 3, mostly adnate to the ovary be- 

 low; seed exalbuminous. 



8. MiPPOCRATEA. — Flowers hermaphrodite, 5-merous; calyx shallow; 

 filaments about as long as the didymous anthers ; style short, terminal, 

 somewhat 3-lobed ; ovary 3-celled, with several axile ovules in each cell; 

 fruit capsular, the carpels compressed and wing-like above, united only 

 at base, the outer half of each falling away; seeds several in each cell, 

 flat, winged at one end. 



