CRUCIFERE. — IONOPSIDIUM. BIVONŒA. 263 



Sect. II. Pastorjea. 



Pastorœa Todaro Nuov. gen. e nuov. sp. 17 [i858]. 



Plantœ cauïescentes , Jloribus racemosis. Siliculœ rcplam margine membra- 

 naceo destitutum. Funiculi liberi. 



8. I. albiflorum DR. in Duchartre Rev. bot. II, 633, et Ail. FI. Alg. t. 72, f. 5; 

 Bail in Bull. Soc. bot. VII, q5o adn. — Pastorœa prœcox Todaro, 1. c. 18. — 

 Bivonœa prœcox Bert. It. X, 520. — Exs. My Alg. i/(3, Puelet Maille FI. Eur. 22 , 

 Choul. 1 1 3 ; Tod. Sic. absque numéro. 



Planta anima, fugacissima, caulescens caule solitario erectiusculo , vel a 

 basiramosa caulibus ascendentibus simplicibus; foliis radicalibus obovatis 

 in petiolum longum contractis integris vel subsinuatis, caulinis obovatis 

 velobovato-suborbiculatis, saepius sessilibus haud amplexicaulibus, grosse 

 et laxe sinuato-dentatis integrisve; floribus parvis, cito clefloratis; racemis 

 usque ad apicem foliis bractealibus caulinis superioribus subconformibus 

 donatis, primum subcorymbiformibus, dein sœpe longiusculis, pedicellis 

 suberectis demum siliculam subœquantibus vel brevioribus; petalis albis, 

 calyce subdimidio longioribus; silicula oblonga, apice subintegra velsub- 

 retusa, stigmate subsessili. ®. Jan.-Apr. 



In collibus calcareis lierbidis, in pascuis et dumetosis, in fissuris rupium um- 

 brosis liumo tenui repletis, in regione Mediterranea montosa et Planitiebus ex- 

 celsis montosis prœsertim provinciœ Oranensis. — Med. G 1 : Kef Zouara (sec.Lx), 

 Constantine (Mars. , Choul.).- A 2 : Dra-Selaman prope Dra-el-Mizan (Thev.); Oued 

 Rkaïr prope Aumale (Char.). - 0" : Oran (DR.), Dj. Santo! (DR., Mars., etc.), 

 Miserghin! (DR.) ;Sidi-bel-Abbès (Lefr.), Tlemcen (DR., War.); Oued Tifrit, 

 Aïn-Nazereg (War.). — Mont. C 1 : Dj.Mahouna (Lx), Dj. Ouach (Emy sec. Par.). 

 - A 1 : Tizi-n-Cheria (Lx). — Plan. A 1 : in ditione Sersou (Kre'm.). - 3 : in mon- 

 tosis : Tiaret (Del., Kre'm.); Satda, Tafraoua, Daïa, Terni (War.); Aïn-Ghoraba ! , 

 Sebdou! (War.). 



In Sicilia. 



Obs. /. Savianum Rail (in litt. - Bivonœa Saviana Car. Prodr. Tosc. Uj ; 

 P. Savi in Nuov. Giom. bot. I, 196, t. 12. - Pastorœa Saviana Rail in herb. 

 olim. - Exs. Cesati It. 4o8, Rost. Ped. 197, Bill. cont. 37o5), in monte 

 Calvi Etruriœ crescens, differt ab /. albifloro habitu robustiore, foliis caulinis pro- 

 fundius dentatis sagittato-amplexicaulibus, racemis basi tantnm foliis bractea- 

 libus donatis, pedicellis longioribus demum patentibus, floribus majoribus, 

 petalis amplioribus , siliculis emarginatis stylo emarginaturam excedente, semi- 

 nibus subglobosis, floratione tardiore. 



40. BIVONŒA. 



Bivonœa DC. Syst. II, 55-i, et Prodr. I, 208; Endl. Gcn. n. £929; Benth. et Hook. 

 Gen. I, 88. 



Sepala suberecta, lateralia basi haud saccata. Petala œqualia, limbo 



subemarginato. Staminum filamenta libéra, exappendiculata. Silicula 



