CHAPTER XVII

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TEMPERATURES.

To enable growers to make a selection of species according to the accommodation that can be afforded for Cactuses, all that are described in this book are here classified in three groups: (1) Species which thrive in a cool-house or frame; (2) Species which can only be successfully grown in a warm house or stove; and (3) Species which are hardy in the more favoured portions of the United Kingdom.

COOL-HOUSE OR FRAME.

Temperature: Summer, that of the open air. Temperature: Winter--day, 50 deg. to 60 deg.; night, 40 deg. to 45 deg.

Cereus Berlandieri. " Blankii. " caespitosus. " cirrhiferus. " ctenoides. " enneacanthus. " flagelliformis. " Leeanus. " leptacanthus. " multiplex. " paucispinus. " pentalophus. " polyacanthus. " procumbens. " reductus. Cereus speciosissimus Echinocactus brevihamatus " centeterius. " cinnabarinus. " Cummingii. " echidne. " Emoryi. " gibbosus. " hexaedrophorus. " Leeanus. " Mackieanus. " mamillarioides. " rhodophthalmus. " texensis. " uncinatus. Echinocactus viridescens. Echinopsis, all the kinds. Mamillaria atrata. " chlorantha. " dasyacantha. " elegans. " elephantidens. " elongata. " fissurata. " floribunda. " gracilis. " longimamma. " macromeris. " macrothele. " multiceps. " phellosperma. " Schelhasii. " Schiedeana. Mamillaria semperviva. " stella-aurata. " tuberculosa. " uncinata. " viridis. " Wildiana. " Zucchariniana. Opuntia arborescens. " aurantiaca. " corrugata. " cylindrica. " Davisii. " Engelmanni. " Ficus-indica. " hystricina. " macrorhiza " occidentalis.

WARM-HOUSE OR STOVE.

It is possible that some of those included in this division will eventually prove hardier than is at present supposed. Many of the species now classed as cool-house plants, and even some of those which are hardy, were formerly grown in the stove.

Temperature: Summer-day, 70 deg. to 90 deg.; night, 65 deg. to 75 deg. Temperature: Winter-day, 60 deg. to 70 deg.; night, 55 deg. to 60 deg.

Cereus caerulescens. " extensus. " fulgidus. " giganteus. " grandiflorus. " Lemairii. " Macdonaldiae. " Mallisoni. " Napoleonis. " nycticalus. " peruvianus. " pleiogonus. " repandus. " serpentinus. " Royeni. " triangularis. " variabilis. Echinocactus concinnus. " coptonogonus. Echinocactus cornigerus. " corynodes. " cylindraceus. " Haynii. " horizonthalonis. " Le Contei. " longihamatus. " mamillosus. " multiflorus. " myriostigma. " obvallatus. " Ottonis. " pectiniferus. " polycephalus. " Pottsii. " scopa. " sinuatus. " tenuispinus. " turbiniformis. Echinocactus Visnaga. " Williamsii. " Wislizeni. Epiphyllum, all the kinds. Leuchtenbergia. Mamillaria, all not mentioned under "Cool-house Or Frame." Melocactus, all the kinds. Opuntia, all not included under "Cool-house or Frame." Pelecyphora. Pereskia, all the kinds. Phyllocactus, " Pilocereus, " Rhipsalis, "

OUTDOOR.

The following may be grown out of doors in the more favoured parts of England. For directions as to culture, see the chapter on Cultivation :--

Cereus Fendleri. Echinocactus Simpsoni. Mamillaria vivipara. Opuntia brachyarthra. Opuntia missouriensis. " Rafinesquii. " R. arkansana. " vulgaris.

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