63, Miscellaneous. 



posed — 1. of an extremely thin, transparent, cellular external enve- 

 lope, coated with papillae ; 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 

 Cruciferce hitherto so little known : — 



ScHizoPETALEiE, R. Br., Botan. Reg. No. 752. 

 Petala pinnatifida, longe unguiculata sestivatione involuta. Sta- 

 mina 6 tetradynama subsequalia. Glandulse 4 hypogynae. Siliqua 

 longa, polysperma. Semina globosa vel ovata subalbuminosa. Em- 

 bryonis cotyledones 4 spirales, vel 2 crasso-spathulatse. Folia ele- 

 ganter pinnatifida vel dentata. Pili omnes ramosi, Flores albi. — Herbae 

 andicolae vel maritimae in regno Chilensi. 



ScHizoPETALON, Hookcr, Exot. Flor. i. p. 74. 

 Calyx 4-phyllus, apice clausus, erectus. Petala 4 pinnatifida longe 

 unguiculata. Stamina 6 subaequalia. Siliqua pilosa. Stigma basi 

 hastatum subsessile. Semina globosa, minima, papilloso-rugulosa. 

 Embryonis cotyledones 4, lineares, aequales, spiraliter convolutse. 

 Radicula curvata. 



1. Schizopetalon Walcheri, Hook, in Bot. Mag. tab. 2379. 



2. Schizopetalon maritimum (nobis). Caule subsimphci, foliis an- 

 gustis pinnatifidis pilosis, spica laxissima, siUqua nervosa glabrius- 

 cula, embryone albo. O 



Perreymondia, nov. gen. 

 Calycis foliola 4, aequalia, erecta, obtusa, clausa. Corolla petala 4, 

 hypogyna, longe unguiculata, lamina ovata, eleganter pinnatifida, 

 laciniis linearibus obtusis sestivatione involutis. Stamina 6, hypo- 

 gyna, tetradynama Filamenta libera, edentula. Antherce sagittato- 

 lineares. Glandules hypogynae 4, lineares, erectae, obtusae, petalis 

 suboppositae. Ovarium 2-loculare, pubescens. Stylus brevis vel 

 nullus. Stigma hastatum, apice subacuminatum. Siliqua bivalvis, 

 dehiscens, et saepe ad maturitatem pendula, polysperma, anguste 

 linearis, et pilis ramosis vestita. Septum membranaceum stomatibus 

 destitutum. Semina ovata, fulva, subrugulosa, subalbuminosa. Em^ 

 bryofiis albi cotyledones 2, incumbentes, spathulatae, apice crassae. 

 Radicula dorsalis recta. — In regno Chilensi. Flores albi. 



1. P err eymondia dentata (nohis). Pubescens; caule macilento, foliis 

 oblongis inaequaliter dentatis ; spica pauciflora, laxissima ; florum 

 pedicellis pilosis. O 



2. P err eymondia rupestris (nobis). Canescens ; caule folioso, ramoso, 

 foliis cano-pinnatifidis, carnosulis ; spica laxa ; floribus pilosis ; 

 siliqua vermiculata, tomentosa. O 



3. P err eymondia multifida (nobis). Caule ramoso hispidulo, foliis 

 angustis inciso-subbipinnatifidis albicantibus ; floribus pilosis ; si- 

 liqua gracili ; stigmata subsessili. O 



4. Perreymondia Brongtiiiirtii (nobis) . Caule erecto, ramosissimo, pa- 

 tulo, foliis dentato-piriiiatifidis, canescentibus, crassiusculis ; spica 

 longa multiflora ; siliqua vermiculata ; stigmate sessili. O 



