THE BOTANY OF THE GUAYANA HIGHLAND— PART II 



349 



As might have been expected, the fruits of M. savannarum are quite similar 

 to those of its nearest relative, Af. pendulum. 



Macrolobium exfoliatum Cowan, sp. nov. (Fig. 64.) 



Arbor 8 m alta, 10 cm diametro, cortice ramulorum exfoliate Folia unijugata; 

 petioli 4.5-5 mm longi, glabri, leviter sulcati; stipulae persistentes, 4.5-6 mm 

 longae, 1-2 mm latae, arcuato-lanceolatae, acutae, ciliolatae. Foliola sessilia, 

 9-15 cm longa, 3-5-5-5 cm lata, glabra, coriacea, leviter arcuata, elliptico- 

 oblonga, ad basim inaequilateralia, latere inferiore rotundo-obtuse sed superiore 

 acuto, ad apicem rotunda, emarginata, epunctata; ccsta salienti, venulis leviter 

 salientibus. Inflorescentiae 7-10 cm longae, e nodis defoliatis ortae fasciculatae, 

 sessiles, axe minute puberulo; bracteis persistentibus, triangularibus , ca. 1 mm 

 longis et latis, extus minute puberulis, intus glabris; pedicellus 3-5.5 mm longus, 

 minute puberulus; bracteolae 5.5*7 mm longae, 3 mm latae, ellipticae, glabrae 

 intus, extus minute puberulae. Hypanthium cupulare, 1.5 mm longum, minute puberu- 

 lum; sepala 4, ovata ad angusto-lanceolata, 2.5-4.5 mm longa, 1 mm lata, glabra, 

 sepala adaxilia biloba vel integra. Lamina petali rotunda, 5 mm longa et lata, 

 unguiculo 5 mm longo, ad basim villosulo. Filamenta 21 mm longa, villosula, 

 antherae ad basim villosulae. Stigma punctiforme, stylus ca. 20 mm longus, ad 

 basim minute puberulus, ovarium 2.5 mm longum, 1 mm latum, minute puberulum. 

 Fructus ignotus. 



TYPE: In riverine forest near Piedra Nunca (just north of Piedra Cucuy), elev. 

 100 m, Rio Negro, Terr. Amazonas, Venezuela, April 10, 1953, Bassett Maguire & 

 John ]. Wurdack 34981 



In my key this species will "key-out" near M. amplexans, Much species it 

 resembles in the disposition of its inflorescences and in the characters of the 

 flowers. However, the new species is quite distinct in respect to leaflet shape, 

 exfoliating bark on the branchlets (hence the specific epithet) as well as other, 

 more minor, characters. 



LEGUMINOSAE-LOTOIDEAE 



Clitoria cerif era Cowan, sp. nov. (Fig. 65.) 



Arbuscula virgata 1.5-2.5 m alta, ramulis strigulosis, novellis 4-angulatis. 

 Stipulae persistentes, 4.5-5 mm longae, 1.5-2 mm latae, lanceolatae, acuminatae, 

 parce striatae, strigulosae extus, intus glabrae. Folia 3-foliolata, petiolo 2.5-5.5 

 cm longo, angulato, parce striguloso, rachibus 2-3 cm longis, angulatis, parce 

 strigulosis, Stipellae persistentes, 3.5-4.5 mm longae, 0.5-1 mm latae, lineari- 

 lanceolatae, acuminatae, glabrae, rigidae. Foliolorum lamina lanceolata ad ovato- 

 lanceolata, petiolulis 3-4 mm longis, parce strigulosis, 10.5-11.5 cm longa, 3.5- 

 4.5 cm lata, ad marginem involuta, ad apicem acuminata, extremitate obutsa mu- 

 cronulataque s ad basim rotunda., glabra (costa parce strigulosa excepta) 5 infra cen- 

 fera costis impressis supra s infra salientibus, venis primariis 6-8-jugatis s venu- 

 lis prominentibus. Inflorescentiae 4.5-6 cm longae, ad nodos defoliatos ortae, axe 

 ca. 2 mm longo, striguloso, bracteis persistentibus, 3.5 mm longis, 1.5 mm latis, 

 lanceolatis, extus parce strigulosis. Pedicelli 5-8.5 mm longi, pilosuli, bracteolis, 

 2.5-4 mm. infra calycem, 4-5 mm longis 1-1.5 mm latis, lanceolatis, striatis, 

 pilosulis. Calycis tubus 15-18 mm longus, minute uncinato-puberulus et parce 

 pilosus extus, intus glaber, lobis 3-8 mm longis, 2 dorsualibus lobis brevioribus 

 lanceolatis ad deltoideis, acutis ad longo-acuminatis, minute uncinatis extus, 

 intus glabris. Vexillum late obovatum, 55 mm longum, 45 mm latum, minute uncinatum 

 et ad basim pilosulum extus, intus glabrum; alae falcato-oblongae, lamina 30 mm 

 longa et 10 mm lata, unguiculo ca. 12 mm longo, minute uncinatae extus, intus 



