158 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[Vol. 9, No. 2 



EL ORO: junction of Rios Ambocas and Luis, 10 km due south of Portovelo. 600-750 

 m, Oct 6, 1944, E-590. 



NAPO-PASTAZA ("Oriente"): valley of Ri'o Pastaza and adjacent uplands, between 

 Banos and Mera, 1050-1500 m, Apr 17, 1945, E-2378. 



SANTIAGO-ZAMORA ("Oriente"): valley of the Rio Zamora, east of Loja, near 

 Zamora, about 900 m, June 28-July 1, 1944, E-12; near Mendez, 525-750 m, Nov 5-6, 

 12^1944 8 30 t>etWeen the R * OS Paute and Upano, near Mendez, 525-750 m, Nov 



Piper canelosense Trel. & Yun. Pip. North. S. Am. 264. /. 228. 1950. 



SANTIAGO-ZAMORA ("Qriente"): Cordillera Cutucu, ca 2° 40' S, 78° W, junction of 

 Rios Itzintza and Chupiasa, 1050 m, Nov 17-Dec 5, 1944, E-1403. 



Piper hispidum Sw. Prodr. Veg. Ind. Occ. 15. 1788. 



SANTIAGO-ZAMORA ("Oriente"): valley of the Ri'o Zamora, east of Loja, near 

 Zamora, ca 900 m, June 28-July 1, 1944, R-ll; near Mendez, 525-750 m, Nov 5-6, 1944, 

 £-889; uplands along Rio Upano just north of junction with Rio Chupiantza, near Mendez, 

 525-750 m, Nov 14, 1944, E-994. 



Piper hispidum var. trachydermum (Trel.) Yuncker, Ann. Missouri Bot. Gard. 

 37: 33. 1950. 



SANTIAGO-ZAMORA ("Oriente"): uplands along Ri'o Upano just north of junction 

 with Rio Chupiantza, near Mendez, 525-750 m, Nov 14, 1944, E-990, E-996, E-997. 



Piper hispidum var. lanceolatum Trel. & Yun. Pip. North. S. Am. 274. /. 237. 

 1950. 



CANAR: valley of Rio de Canar, near Rosario, 1170 m, Sept 6-10, 1944, Prieto 

 CP-25. 



In this specimen the stems are sparsely hispid and the nerves beneath are 

 more silky-hairy than hispid but otherwise it agrees well with this variety. 



Piper ignacioanum Trel. & Yun. Pip. North. S. Am. 280. /. 244. 1950. 



GUAYAS: coastal plain, in the vicinity of Naranjito, ca 36 m, June 6-7, 1945, E-3550. 



Junction of GUAYAS, CA5JAR, CHIMBORAZO & BOLIVAR: foothills of the western 

 Cordillera near the village of Bucay, 300-375 m. June 8-15, 1945, E-3772 



Piper coruscans H.B.K. Nov. Gen. & Sp. 1: 53. 1815. 



GUAYAS: coastal plain, in the vicinity of Naranjito, about 36 m, June 6-7, 1945, 

 E-3586. 



Piper archidonense Trel. Rev. Hisp.-Am. Ci. 2: 206. 1941. 



SANTIAGO-ZAMORA ("Oriente"): Cordillera Cutucu, ca 2° 40» S, 78° W, along 

 narrow flood-plain of Rio Itzintza, 1050-1110 m, Nov 17-Dec 5, 1944, E-1227. 



Piper pilovarium Yuncker, sp. nov. 



Arbor; internodiis superis conferte brunneo-pubescentibus, pilis brevibus 

 longisqtle una intermixes; foliis lanceolatis, apice attenuate acute acuminatis 

 mucronatis, basi subaequilateraliter rotundato-cordulatis, utrinque subvillosis, 

 a parte infera pinnatim venosis; ovario globoso, perconferte pubescente; stig- 

 matibus deorsum pubescentibus. 



Tree, 8 m tall, with trunk 20 cm in diameter; upper internodes rather slender, 

 4-5 cm long, lengthening downward, densely subretrorsely brown-hairy, the hairs 

 of various lengths up to 2 mm long; leaves lanceolate, 4-7 cm wide x 15-23 cm 

 long, the apex attenuately sharp-acuminate, the tip with a hairy mucro up to 3 mm 

 long, the base subequilaterally rounded, cordulate, with one side 1-2 mm shorter, 

 or occasionally acute, both sides subvillous, the nerves very densely so, the 

 hairs suberect, slightly rugose when dry, pinnately nerved from the lower half, 

 the nerves 5-7 on each side, with cross-connecting-anastomosing nervules, dark 

 green above, paler beneath when growing, drying dark, opaque, glandular-dotted 



