68 Miscellaneous. 
posed—-1. of an extremely thin, transparent, cellular external enve- 
lope, coated with papille; 2. of a brown, somewhat thick, central 
coating; and 3. of an internal membrane surrounding the embryo, and 
performing the functions of a kind of perisperm. Iodide of potassium 
shows the presence of numerous grains of starch in it. 
The following is a brief monographic sketch of this tribe of the 
Crucifere hitherto so little known :— 
ScuizoPeTaed, R. Br., Botan. Reg. No. 752. 
Petala pinnatifida, longe unguiculata estivatione involuta. Sta- 
mina 6 tetradynama subequalia. Glandule 4 hypogyne. Siliqua 
longa, polysperma. Semina globosa vel ovata subalbuminosa. Em- 
bryonis cotyledones 4 spirales, vel 2 ecrasso-spathulate. Folia ele- 
ganter pinnatifida vel dentata. Pili omnes ramosi. Flores albi.—Herbe 
andicolz vel maritime in regno Chilensi. 
Scuizopetaton, Hooker, Exot. Flor. i. p. 74. 
Calyx 4-phyllus, apice clausus, erectus. Petala 4 pinnatifida longe 
unguiculata. Stamina 6 subequalia. Siliqua pilosa. Stigma basi 
hastatum subsessile. Semina globosa, minima, papilloso-rugulosa. 
Embryonis cotyledones 4, lneares, equales, spiraliter convolute. 
Radicula curvata. 
1. Schizopetalon Walcheri, Hook. in Bot. Mag. tab. 2379. 
2. Schizopetalon maritimum (nobis). Caule subsimplici, foliis an- 
gustis pinnatifidis pilosis, spica laxissima, siliqua nervosa glabrius- 
cula, embryone albo. © 
PERREYMONDIA, noy. gen. 
Calycis foliola 4, eequalia, erecta, obtusa, clausa. Corolla petala 4, 
hypogyna, longe unguiculata, lamina ovata, eleganter pinnatifida, 
laciniis linearibus obtusis zstivatione involutis. Stamina 6, hypo- 
gyna, tetradynama. Wilamenta libera, edentula. Anthere sagittato- 
lineares. Glandule hypogyne 4, lineares, erectz, obtuse, petalis 
subopposite. Ovarium 2-loculare, pubescens. Stylus brevis vel 
nullus. Stigma hastatum, apice subacuminatum. Siliqua bivalvis, 
dehiscens, et sepe ad maturitatem pendula, polysperma, anguste 
linearis, et pilis ramosis vestita. Septum membranaceum stomatibus 
destitutum. Semina ovata, fulva, subrugulosa, subalbuminosa. EHm- 
bryonis albi cotyledones 2, incumbentes, spathulate, apice crassz. 
Radicula dorsalis recta.—In regno Chilensi. Flores albi. 
1. Perreymondia dentata (nobis). Pubescens; caule macilento, foliis 
oblongis inequaliter dentatis; spica pauciflora, laxissima; florum 
pedicellis pilosis. © 
2. Perreymondia rupestris (ncbis). Canescens ; caule folioso, ramoso, 
foliis cano-pinnatifidis, carnosulis ; spica ae ; floribus pilosis ; 
siliqua vermiculata, tomentosa. © 
3. Perreymondia multifida (nobis). Caule ramoso facpuinke foliis 
angustis inciso-subbipinnatifidis albicantibus ; floribus pilosis; si- 
liqua gracili; stigmate subsessili. © 
4. Perreymondia Brongniarlii (nobis). Caule erecto, ramosissimo, pa- 
tulo, foliis dentato-pinnatifidis, canescentibus, crassiusculis ; spica 
longa multiflora; siliqua vermiculata; stigmate sessili. © 
