846 LXXVIII. CACTE EE. 
ligera, apice umbilieata v. perianthio marcescente coronata, 1-locularis, oc-sperma, placentis 
pulposis. Semina nidulantia, tumida v. eompressa, oblonga v. reniformia; testa atra, 
erustacea v. ossea, levis impresso-punctata granulata v. tuberculata ; albumen parcum v. 
copiosum v. fere 0. Embryo rectus curvus v. hemicyclicus, teres erhudiibus clavatus v. 
pyriformis; cótyledones libere. v. in corpus ovoideum emarginatum connate, plano- 
convexs v. foliacez, semini contrari v. parallele ; radicula cylindrica v. conica. 
Herbsm frutices v. arbores, habitu, Pereskia excepta, valde singulares, succo aqueo v. 
laeteo scatentes. Caulis elongatus ramosus v. ad conum globum v. columnam reductus, 
teres angulatus costatus v. tubereulis (ramis folisve abbreviatis) undique tectus, intus 
earnosus, cylindro e fibris ligneis reticulatis constante percursus, medulla latissima ; 
costs v. tubercula pulvillis lanatis sparsis v. seriatis ornate, pulvillis sepissime aculei- 
feris v. spiniferis. Spin» multiformes, leves v. transverse costats, recte v. hamate, 
interdum epidermide laxa opereulatim tect», in Opuntia et Nopalea apice glochidiatm - 
Folia s;pissime minuta, squamzformia, caduca, in pulvillis sita, in Pereskia sola ampla. 
Stipule 0. . Flores ( Pereskia excepta) solitarii, sessiles, in caule axillares terminales v. ir 
crenis v. costis inserti, seepissime speciosi. 
Species. ex auctorum descriptionibus ad 1000, sed ab hortulanis inordinate multiplieatee, in regioni- 
bus tropicis et subtropicis Americie magna copia vigentes, pauese etiam regionum temperstarum Chili 
incole et in Canada usque ad gradum bor. 50? extensm. — RAipsalidis species una in. Africa australi, 
Mauritio et Zeylania indigena est, et Nopalec et Opuntic species paucrm in orbem veterem introdueta, 
et nunc late disperss. 
Ordo nulli arcte affinis, sed Fcoideis multis notis accedens. 
CONSPECTUS GENERUM. 
"Tribus I. Echinocactes. Calycis tubus ultra ovarium productus. Caulis costis tuberenlis 
v. processubus elongatis apice aculeiferis opertus, rarissime foliis squamseformibus auctus. 
* Caulis brevis. Flores in costis tuberculisve sepivs distinctis axillares. | Ovarium — leve, 
non aculeigerum nec áquamosum. ; 
l. MErocacTvs. Caulis basi planus, capitulo florifero angustiore cylindrieo lanato coro- 
D M ins. Ind. occid. et. Brasilia. 
2. MAMILLARIA. Tubercula mammesformia v. elongata et angulate.rarius in costas crassas 
confluentia, apice pulvillo aculeifero terminata. Flos sepe zonatim dispositi.— Plereque 
Mexico et Amer. bor. calid. 
3. PELECYPHORA, Caulis clavatus. "Tubercula spiraliter conflata, rhombea, scutello fim- 
brillifero terminato.— Mezico. s 
** Caulis brevis. Flores in tubercula sepius in costas confluentia terminales. | Ovarium ezsertum, 
&epe squamosum v. aculeiferum. | (Tubercula in Leuchtenbergia valde elongata.) 
4. LEUCHTENBERGIA. Caulis basi nudus, cicatricatus, superne tuberceulis valde elongatis 
9-quetris setis glumaceis terminatis instructus.— Mezico. 
6. EcniNocACTUS. Calycis tubus amplus, campanulatus. Ovarium et bacca squamata. 
Tubercula brevia v. in costas confluentia.— Plereque Mezico. 
6. DiscocacTUs. Calycis tubus gracilis, fauce staminibus oeclusa. Ovarium et bacca gla- 
berrima.— Brasilia. 
*** Caulis sepissime elongatus erectus v. scandens, ramosus, costatus v. angulatus. — Folia 0 v. wenidt 
formia. Stamina libera, tubum calycis elongatum fere equantia, — Ovariwm. exsertum, aculeatum v. 
squamosuimn. 
7. CEREUS.—.4mer. trop. et calid. i : 
"V Caulis compressus v, alatus, articulatus, articulis costa percursis. Flores apicibus v. erenulis 
articulorum insertis. Ovarium exsertum, glaberrimum. 
8. PuyrrocacTUs. Calycis tubus sepissime gracilis. Stamina inzequalia.— Amer. frop. 
9. ErrPHYLLUM. Calycis tubus brevis, fauce smpe obliqua, lobis petaloideis. Petala in 
tubum conniventia. Stamina longe exserta, stylo appreasa.— Brasilia. 
Tribus II. Opunties. Calycis tubus ultra ovarium non pee Tif sitcvMM, atti- "e 
-culatus. 
