CRUCIFERE. — SISYMRRIUM. 137 



Sect. I. Malcolmiastrum Fourn. — Racemi aphylli. Pedicelli fructiferi haud 

 vel superne tantum incrassati. Flores violacei vel purpureo-lilacini. Siliqua 

 subteres vel tereti-compressa. Valvae uninerviae. Septum fasciis fibrarum 

 duabus angustis vel latis distinctis vel confluentïbus medio percursum. Se- 

 mina minuta, haud striata. 



Obs. Sectio Malcolmiastrum , habitu notisque plurimis Malcolmiœ, cum qua a 

 cl. Boissier conjungitur, afïînis, sed propter stigina capitatum ad Sisymbrium melius 

 referenda videtur. 



I. S. nanum DC. Syst.ll, h86 , et Prodr. I, 1 g5 ; Led. Ross. I, 181 ; Coss. in Bull. Soc. 

 bot. X, 397. — Hesperis Orientalis, maritima, Leucoii folio incano , flore minimo Tourn. 

 Inst. Coroll. 16. — H. ramosissima Desf. in Herb. Mus. Par. non FI. Ail.; DC. Syst. 

 II, A55, et Prodr. I, 189 ex parte quoad plantam Tournefortianam e Gaïatia. — 

 Cheiranthus nanus Merk. ined. sec. Stev. in litt. ad DC; herb. Willd. n. 12109 

 sec. Led. — Sisymbrium binerve C.-A. Mey. Enum. Cauc. 189; Hohen. Talysch in 

 Bull. Soc. nat. Mosc. VI, 376; Jaub. et Sp. ïllustr. Or. III, 1A7, t. 298 (descr. et ic. 

 optimee). — Malcolmia binervis Boiss. in Ann. se. nat. sér. 2 , XVII, 71, et Or. I, 222. 

 — M. confusa Boiss. Or. I, 221. — Exs. Bal. Alg. 1 55 sub Malcolmia parviflora, 

 War. 10; Kral. Tun. 3i sub M. parviflora; Thev. in Bill. Gall. 3oo8 sub. M. parvi- 

 flora; Port, et Rig. It. 5^2 ; Heldr. Grœc. norm. 55o sub M. parviflora; Hohen. Casp. 

 un. it. [1 836] sphalmale Sisymbrium trinerve. 



Planta annua, tota pube stellata molli brevi induta, plerumque cine- 

 reo-velutina; caule sœpe pusillo, subsimplici vel a basi ramoso ; foliis 

 oblongis, inferne attenuatis, obtusis, integris, denticulatis , sinuato-dentatis 

 vel subpinnatifidis ; racemis pauci- vel plurifloris, etiam demum subcorymbi- 

 formibus vel Iaxis plus minus elongatis, pedicellis calycem subœquantibus vel 

 paulo longioribus ; floribus minutis; sepalis lateralibus basi subsaccatis; pe- 

 talis lilacino-purpureis, calyce subduplo longioribus, limbo obovato vel 

 oblongo-obovato apice integro vel obsolète retuso; sïliquis gracilibus, tereti- 

 subcompressis, torulosis, pube stellata molli plus minus indutis, apice 

 abrupte in stylum contractis , cito dehiscentibus, stylo latitudine siliquœ bre- 

 viore, stigmate subcapitato vix bilobo lobis brevibus subrotundis, septo 

 tenui alveolato laie hyalino nempe fasciis duabus tenuibus distinctis vel confluen- 

 tibus in medio tantum percurso. ®. Febr.-Jun. 



In aggeribus arenœ mobilis Algeriae interioris rarissime littoreœ, in alluviis et 

 alveis, prsesertim in Planiliebus excelsis inter cœspites Stipœ tenacissimae. — Med. 

 2 : Mostaganem (Bal., Mialh.); Mascara (Pomel). — Plan. G 2 : Msila (Merche), 

 in ditione Hodna: Aïn Kelba (Lx), Ain Cedra (Reb.). — A 2 : Sidi-Hadjerez, Dra- 

 el-Ogueb prope Aïn Adjel (Char.), in ditione Zahrès (Reb.). - O 6 . — San. in mar- 

 gine septentrionali regionis : G 2 : Mdoukal (Lx), Biskra, Montagne de Sable prope 

 Biskra (Bal.). -A 1 : in ditione Hodna: Bou-Saada (Reb., Soll. , Vilm.), Madher- 

 Roumana (Reb.), Aïn Roumana, El-Hamel (Soll.). - O 3 : inter Dj. Melah et Asla, 

 Aïn-Sefîssifa (War.). — TUN. Hammamet et ad boreali-occidentem Hammamet! 

 (Miss. i883); Aïn-Cherichira! , Sousa! , Mehediaf , Zeram-ed-Din ! (Miss. 1 883), 



