MUI.1''0RD EXPLORATION OF THE AMAZOI«r VALLEY 



383 



basal lobes, strongly margined by the thick lateral ribs, the si- 

 nuses between it and tlie basal lobes broad and rounded, one 

 more so than the other. ]\liddle lobe of leaf about three fifths 

 the length of the blade, its width a little more than half its 

 length, somewhat narrowed at the base, abruptly short-acumi- 

 nate and acute, sinuat(^-dentate, the sharp salient teeth much 

 smaller than those of the outer leaf-margin. Lateral lobes in- 

 equilaterally ovate, broadest at the base, acute, the sinuses nar- 

 row, obtuse. Outer margin of leaf irregularly erose-dentate, the 

 teeth broadly triangular, acute, divaricate. Upper leaf-surface 

 green, minutely strigulose and slightly harsh, the venation not 

 prominent, the lower surface gray-green, softly tomentellate, the 

 venation lightly prominent, strongly, crookedly and coarsely 

 anastomosing. Uml)els sessile along and at the end of leafless 

 branches. Bracts of the gray-tomentellate umbel unequal, elon- 

 gate-subulate with attenuate summit. Pedicels elongating some- 

 what in fruiting, more or less flattened, scarlet, at least above, 

 almost imperceptibly continuing into the base of the calyx and 

 ovary. Calyx-tube, in the young flowering stage, 2 cm. long to 

 the summit of the ovary, the throat above that portion 1 cm. 

 long to the base of the lobes, the base of the throat bearing an 

 annulus that is incurved over the sunnnit of the ovary. Calyx- 

 teeth somcAvhat unequal, to about 1 cm. long, subulate, attenuate 

 and acute. Petals about half the length of the calyx-lobes, ovate, 

 acute, thick. Young fruits oblong, about 3 times as long as 

 broad, puberulent, bearing the flower, with its enlarged peculiar 

 annulus. 



Near Keyes, 1,000 feet, M. Cardenas, November 12, 1921 {no. 

 1733 ) . " Climbing in copses of pampa. ' ' 



Gurania latifolia 



(Staminate plant.) Nearly glabrous. Stems elongated, very 

 slender, very minutely and sparsely puberulent. Petiole about 

 one third the length of the blade, green, flattened, dilated at the 

 base, 3-ribbed on the upper surface. Blade shallowly and very 

 broadly cordate, deeply 3-lobed, its length about four fifths of 

 its breadth. Basal lobes very short and broad, rounded, the base 

 of the blade slightly produced into the sinus, shortly and broadly 

 triangular, margined by the lateral ribs. Middle lobe ovate-oval, 

 half as wide as its lengtli, the base contracted to about half- 

 width, the summit very abruptly contracted into a very short 

 acute point, the margin sinuate-dentate, the teeth nearly obso- 

 lete. Sinuses open but not wide, obtuse. Lateral lobes inequi- 



