104 



heights, this circumstance will suffice to indicate whether the 

 pedicel is right-handed or left-handed. 



3. In calyces with free sepals it is often easy to find dut 

 the direction of the calycinal spiral, and the direction of the 

 pedicel spiral may be concluded from their aestivation. 



4. In the Leguminoscc the first sepal is closer than usual 

 to the median line, which modifies the form of the flower with- 

 out disturbing its general relations of organization. 



5. The two bracts may be opposite-decussate : they may 

 also not exist. In paragraphs 5 and 6, the spiral and scorpioid 

 uniparous cyme is treated of, and in conclusion the following 

 summary communicated. 



1. The binodal uniparous cyme is common in dicotyledo- 

 nous plants. 



2. To the upper bracts belongs constantly, or appears to be- 

 long, the germen. 



3. The cyme maybe helicoid or scorpioid according to whe- 

 ther the pedicels are homotropous or heterotropous ; it is disti- 

 chous when the distichous arrangement prevails on the pedicels. 



4. It may be elongated or prolonged according to the state 

 of the pseudothallus, sessile or pedunculated, with sessile or 

 pedicellate flowers, simple or double. 



5. It may be axillary or terminal : in the latter case it may 

 be considered as formed of one or two partial axillary cymes 

 and of a central terminal flower. 



6. In a scorpioid cyme the aestivations of the flower of each 

 series have a fixed relation indicating the nature of the cyme. 



7- The involution is a necessary consequence of the axil- 

 lary angle. 



8. The floral series are organically opposed to the series of 

 fertile bracts, but the excentric inequality approximates them, 

 and separates on the contrary these latter one from another. 



9. The sterile bract is frequently smaller than the fertile 

 bract ; it is frequently abortive ; both may also prove abortive. 



10. The primitive bract frequently coheres with its axil- 

 lary pedicel. 



11. The number of flowers is frequently variable ; it dimi- 

 nishes above in the thyrsus, and the cyme may become uni- 

 florous in consequence of this diminution. 



12. The pedicels have sometimes a torsion in the direction 



