24 



THE CACTACKAE). 



I 



Monvillea phatnospenna (Schumann). 



Cereus phatnospermtis Schumann, Monatsschr. Kakteenk. 9: i86. 1899 



diameter 



ribs rounded, somewhat concave on the sides; spines brown, subulate; radial spines 5 or 6, spreading, 

 . ^ ^^ ir.*^rr' -r>«tnft-oi ct^i'nf^c wVi^ti r\r(^<if^nf vitmi aTif or coTTiPwhat ourved. uo to 2,^ CTTi. loner: flowers 



ovary subnaked, narrow, cylindric 



4 



Type locality: Near Porongo, Paraguay 



Distribution: Paraguay. - 



The olant is known to us only from the 



' 



■- • 



■/ 



Monvillea diffusa 



with 



when growing in the open often forming thickets 2 to 5 meters in diameter; ribs high and thin, 



usually 8; areoles 2.5 to 3 cm. apart, gray-felted ; radial spines 



6 to 10, spreading, acicular, 6 to 12 mm. long; central spines 



I to 3, one usually much elongated, 2 to 3 cm. long, subulate, 



gray with black tips; flowers 7.5 cm. long, the tube strongly 



ribbed; scales on the flower-tube ovate, acute; ovary globose 



with elongated tubercles or ribs; scales on ovary minute, acute. 



Common on the hillsides of the Catamayo Valley in 



hern Ecuador. 



Collected by J. N. Rose, A. Pachano, and George 



Figure 23 shows a flower and young fruit from the 



Fig. 23. — Monvillea diffusa. X0.5. 



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;■ ' 



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t 



Monvillea maritima 



growing 



shrubs and trees and often high-clambering, either simple or with few distant branches, these weak, 

 ascending or drooping ; ribs 4 to 6, somewhat undulating, the areoles borne in the depressions, 

 2 to 3 cm. apart; spmes about 8, all gray, with black tips; central spines i or 2, one much longer and 

 stouter, 5 to 6 cm. long; upper part of flower-bud nearly globular, merely acute at apex; flowers 6 cm. 

 long ; flower-tube f amtly angled without, naked for about 3 cm. above the base of the style ; ovary 

 oblong, famtly angled, the scales broad with a minute scarious tip. 



■ ^ I ' 



Common in the thickets along the coast of southern Ecuador near Santa Rosa where 

 It was collected by J. N. Rose and George Rose, October 1918 (No. 23495). 



I^!.£°^.^^! °/. ^^^f ^P^^^^? ^^^ ^^F^^^^ ^° ^^°s^ o^ ^- diffusa, but the two plants grow 



M. diffusa grows on the mountain 



very amerent situations and are of different habit 



siae 01 a very ana mtenor valley at an altitude of about 2,170 meters, while M. maritima 

 IS from a humid region near sea-level; the former grows in the open while M. maritima grows 

 among bushes and trees. 



V - 



Monvillea amazonica 



r^ 



Cereus amazonicus Schumann in Vaupel, Monatsschr. Kakteenk. 23: 164. 



1913- 



J: 



■T-i_>x .' 



mm 



stem 



not at the tin ^frQiVHf Q o*^ 1^ 1 ^' "wvv^io uuiiic uii ine upper part ot tne stem but 



spLt suMlnVd\^''''^n nt^^^^^^^^^^ -^ fl— tube withou't hairs, bristles, or 



fruit 



segments 



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y. 



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Type locality: Loreto 

 Distribution: On the 



Amazon 



ntly a remarkable spec 

 ind may very likely repi 

 Monatsschr. Kakteenk 



from the descript 



*J ^ — — -— ' -^ w »jr ^^ 9 



165, as Cereus amazonicus. 



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