33 



Ordo CXIIl CACTEAE*) dc. 



(DC. Prodr. III. 457. — Walp. Ann. III. 673.) 



Dr. Engelmann : Notes on Cereus giganteus et some other Californ. CaciPae, 

 in Siliira. Am. journ. ser. II. vol. 14. (ISS'?) p. 335. — Engelmann Report 

 on ihe bot. of the PaciQc Railroad expedit. since 1853. (1856). — Engel- 

 mann Synopsis of the Cactaceae of the territory of the Unii. St. and 

 adjacent regions, (from the proceed. of the Am. Acad. of Arts and sc. 

 vol. III.). — Salm Dyk, Nachtrage zu Cact. in horlo Dyk. cultae in d. 

 Allg. Gart. Ztg. XXII. 185, u. in d. Bonplandia II. 199. — Pfeiffer Abb. 

 u. Beschreihg. bluh. Cacteen vol. II. fasc. 6 (1850). 



Tribus I. TUBULOSAE Miq. 

 Subtribus I. PAHALLELAE. 

 Cotyledones marg. hilum veisus speclan'tes, laterib. seminis parallelae. 



I. (5154 a.) ]WAM[mE.IiABIA Haw. 

 (Walp. Rep. 11. 283. - Walp. Ann. II. 673.) 

 Labouret, note relat. sur un charact. du genre Mammillaria, bullet. de I. soc. 

 bot. de France p. 210—213. — Engelmann Synopsis I. c. p. 4. 



Ovar. baccaque laeves. Sem. fere exalbuminosa. Cotyled. abbre- 

 vialae, plerumque erectae , subconnatae. — Plantae mammillalo - tuber- 

 culatae; inflor. laterali s. verticali, 



Subgen. EUMAMMILLARIA. 



Fl. ex axillis tuberculor. anni prioris nunquam sulcatorum: ovar. 

 plerumque immersum versus fructus maturitatem emergens. 



§. 1. Polyacanthae Salm. 



1. MAMMILLARIA MICROMERIS, E. in Bound. Comm. Rep. — Engelm. Synops. p. 4. 

 Parvula, simplex, globosa; tuberculis minimis venucaeformib. con- 



fertissimis; areolis juniorib. solum lana laxa vestilis; acul. setiformib. 

 cinereis pluriseriatis , in pl. juniorib. sub 20 aequalib. lineam longis, 

 radiantib. in tuberculis floriferis 30—40 undiq. stellato-porrectls, supe- 

 riorib. 6 — 8 longiorib. clavatis; fl, minimis subcentralib. 



var. p. Greggii: major, tuberculis majorib. acul. pauciorib. rigidiorib. 

 Habit. : Ab EI Paso usque ad (1. San Pedro River. var. p- pr. Saltillo. — 'A — IV2 

 poll. diam ; var. p. saep, 2 pollic. diara. v. uUra , caei. FL laete rosei (light pink). 

 M. microtheli Miihlenpf. spinis 2 centralib. donatae afflnis. 



2. MAMMILLARIA LASlACAiNTHA Engelm. 1. c. 



Parvula, simplex, globosa; tuberculis teretibus acul. setiformib. pilo- 

 sulis s. denudatis 40—80 pluriseriatis onmib. radianlibus; fl. lateralib. 

 albidis. 



Hab. ad nura. Pecos, in Texas occid. 11. Maj. — Planta 'A— 1— IV2 polL alta , et fere 



totidem diam.; tuberculis 2—3 lin. , spinis IV2 — 2V2 lin. longis. Fl. albescentes v. 



pallide rosei . 6 lin. longi. — M. Schiedeana Ehrenb. afflnis videlur, sed multo major, 



tuberculis in axillis lanaiis magnis , caet. 



*) CACTEARUM ordo , melius inier Reaumuriaceas et inler Ribesiaceas collocandus, 

 rationib. nonnullis cogeniibus sedera suam hic inter Saxifrageas et inter Urnbellileras 

 recepit, et jnm species primum per annura 1856 publicatas ampleciiiur. 

 V. 5 



