370 
On the Estivation of Flowers. 
JESTIVATI 
OX IMBRICATED, 
qUINCUNClAL, OR OTHERWISE. 
Form of Corolla or Caly^. 
Thymelefe, 
Calyx, 
Regular. 
Laurinea?, 
Calyx, 
Regular. 
Polygonea^, 
Calyx, 
Regular, or irregular. 
Boraginea, 
Corolla, 
Regular, or sligbtly irregular. 
Labiea?, 
Corolla, 
Irregular. 
Verbenacetr, 
Corolla, 
Regular and irregular. 
Solanese, 
Corolla, 
Regular, or slightly irregular. 
Pevsonneae, 
Corolla, 
Irregular. 
Jasmine*, 
Corolla, 
Regular. 
Bignoniacere, 
Corolla, 
Irregular. 
Acanthaceae, 
Corolla, 
Irregulai-, or nearly regular. 
Gesneriece, 
Corolla, 
Irregular. 
ValerianesB, 
Corolla, 
Regular, and irregular. 
Uinbellifera^, 
Corolla nearly va' 
Ivary, Regular, or irregular. 
Crassulaceae, 
Regular. 
Violacese, 
Regular, or irregular. 
Rosaceae, 
Regular. 
Legiiminosa?, 
Irregular, or regular. 
Terebinthaceae, 
Regular. 
Geraniaceoe, 
Regular, or irregular. 
Tropeoleae, 
Irregular. 
Balsaminese, 
Irregular. 
Papaveraceae, 
Regular. 
Fumariacetp, 
Irregular. 
Capparideae, 
Regular, or slightly irregular. 
Resedacea', 
Irregular. 
Cruciferoe, 
Regular, or irregular. 
Ranuncnlacese, 
Rutaceae. 
Regular, or irregular. 
Regular, or irregular. 
Irregtilarity in Flowers. 
M. Dutrochet, lately addressed a letter to the Academie des Sciences, 
of Paris, in which he explains the irregularity of form in flowers, as 
dependent on the same cause to which he attributes the irregularity of 
the interior organs in animals, — that is, to the abortion of some of their 
parts. "This idea," says M. Dutrochet, "belongs originally to M. 
Cassini ; but I have observed several facts, which confirm its accuracy. 
Irregular flowers are always lateral; if by chance they become terminal, 
they resume their original regularity, because their developement ope- 
rates then, with equal liberty on every side." 
That irregular regularity^ mentioned under the name of Pelorie, 
must have been observed in different species of flowers. But M. Du- 
trochet first had an opportunity of proving the fact on a papilionaceous 
plant, the Cytisus, of the Alps. A terminal flower, exhibited to his 
notice six petals, four of which were disposed crosswise, and above, two 
other contiguous alternating petals, The manner, in which these petals 
