196 Plantcs Lindheimeriance. 



soil, on the Upper Guadaloupe. My specimens from there are 

 mostly densely caespitose ; tubercles in thirteen oblique rows ; 

 proliferous groove producing the buds always near its upper 

 end. Flowers 2 inches long and 2 to 2| inches in diameter: 

 sepals (or rather outer firmer perigonial leaves) 20-35: 

 petals (inner more delicate petaloid perigonial leaves) 30-35, 

 yellow (dirty yellow only when fading), reddish at the base. 



M. compacta, Engelm. in Wisliz. Rep. not. 32, from the 

 mountains of Chihuahua is mentioned here only in order to 

 add to the description of the plant that of the flower which I 

 have had occasion to examine in the living state. — Floribus 

 in vertice dense lanato centralibus ; sepalis (17-19) lanceo- 

 latis acutis integris (rufescentibus, interioribus margine fla- 

 vis) ; petalis (28) oblongo-lanceolatis mucronatis versus 

 apicem denticulatis (sulphureis) ; stigmatibus 7 - 8 cuspida- 

 tis flavicantibus supra stamina (sulphurea) paulo exsertis. — 

 Flowers at the end of June and beginning of July (in St. 

 Louis). Flower-bud dark reddish brown: flower about 15 

 lines long and of the same diameter. Petals 6 lines long and 

 1? lines wide. Stigmata 2 lines long, cuspidate, as in M. 

 vivipara, while all other species known to me have obtuse 

 stigmata. 



Mammillaria radios a (sp. nov.) : simplex s. parce pro- 

 lifera, ovata seu cylindrica ; tuberculis teretibus supra plus 

 minus sulcatis apice ex tomento albo aculeatis ; aculeis rec- 

 tis numerosis valde ineequalibus, plurimis (20-30) radian- 

 tibus tenuioribus albidis, centralibus 4-5 robustioribus fuscis 

 s. rarius flavis, 3-4 sursum directis, singulo deflexo; axillis 

 nudis, sulco subtomentoso ; floribus (violaceis) ex axillis tuber- 

 culorum hornotinorum ortis sparsis (nee centralibus) ; sepalis 

 petalisque lineari-lanceolatis acuminatis aristatis; sepalis 

 (40 - 50) arachnoideo-fimbriatis, exterioribus brevioribus ad- 

 pressis, interioribus longioribus recurvatis ; petalis (30-40) 

 integris s. basi subciliatis patentibus ; staminibus (violaceis) 

 numerossimis sequalibus ; stylo longe exserto ; stigmatibus 

 7-9 (violaceis) erectis obtusis ; bacca oblonga viridi floris 



