52 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [ Vol. 8, No. 1 



gracilibus circiter 1 mm. longis parce breviter hispidulis;' laminis papyraceis in 

 sicco supra olivaceis subtus fuscis oblongo-ellipticis, ( 10-)1 2—1 5 mm. longis, 

 (3-)5-8 mm. latis, basi obtuse cuneatis, apice obtusis vel rotundatis, margine re- 

 curvatis, utrinque glabris vel subtus raro obscure glandulosis secus costam, e 

 basi obscure 5-nerviis, costa supra leviter impressa subtus elevata, nervis aliis 

 immersis; floribus solitariis axillaribus subsessilibus praeter calycis lobos et 

 filamentas glabris, bracteis basalibus paucis papyraceis suborbicularibus maximis 

 haud 1.5 mm. diametro; pedicellis gracilibus circiter 0.5 mm. longis, bracteolis 

 apicalibus papyraceis suborbicularibus 3-3.5 mm. longis et latis rotundatis calycis 

 tubum amplectentibus; calyce sub anthesi circiter 5 mm. longo et apice diametro, 

 tubo cupuliformi circiter 2 mm. longo, limbo erect o-p at ente papyraceo profunde 

 4-lobato, lobis oblongo-deltoideis 2.5-3 mm. longis 2-2.5 mm. latis apice incrassatis 

 subacutis minute hispidulis; disco annulari-pulvinato; corolla tenuiter carnosa 

 late campanulata etiam subrotata 5-6 mm. longa apice 7-8 mm. diametro profunde 

 4-lobata, lobis deltoideis 3.5-4 mm. longis et basi circiter 3 mm. latis valde re- 

 flexis apice obtusis; staminibus 8 quam corolla brevioribus, filamentis ligulatis 

 gracilibus liberis circiter 1.5 mm. longis superne parce hispidulis, antheris 3-3.5 

 mm. longis, thecis basi rotundatis, tubulis gracilibus quam thecis brevioribus 

 per rimas ovales circiter 0.5 mm. longas dehiscentibus; stylo crasso tereti leviter 

 exserto, stigmate minuto. 



Napo-Pastaza: Valley of the Rio Pastaza and adjacent uplands, near junction 

 of El Tigre and Pastaza, below Topo, 5 ,600 ft. elev., May 9, 1944, Camp E-1692 

 (TYPE US 1,989,039; dupl. NY) (epiphyte, blown from tree-top; terminal new 

 growth in bud notably mucilaginous; flowers white; fruit white, translucent). 



The very distinct new species here described is characterized by its lax 

 habit, elongate branchlets with a persistent hispidulous indument, well-spaced 

 leaves of average size for the genus, solitary subsessile flowers, and especially 

 by its broadly campanulate or even subrotate corollas. In size and shape of leaves 

 it approximates D. humboldtii (Kl.) Nied. (Guatemala to Venezuela and Colombia), 

 but that species has shorter calyx-lobes, a cylindric corolla, comparatively long 

 filaments, and anthers with proportionately longer tubules. In floral characters 

 the new species seems closest to D. codonanthum Blake, and its leaves (although 

 still considerably larger) are even suggestive of the large-leaved phase of that 

 species, discussed above. However, D. campii also differs from D. codonanthum 

 in its branchlet-indument, shorter pedicels, shorter and even more broadly cam- 

 panulate corollas, and short filaments. 



Disterigma micranthum A. C. Smith, sp. nov. 



Frutex nanus, ramulis primo brunneis obtuse angulatis laxe pilosis (pilis cir- 

 citer 1 mm. longis) demum cinerascentibus teretibus glabratis, ramulis brevibus 

 bracteis papyraceis imbricatis lanceolato-oblongis (maximis circiter 6 mm. longis) 

 basi circumdatis; foliis non confertis 3 vel 4 per centimetrum; petiolis gracilibus 

 subteretibus circiter 1 mm. longis parce puberulis; laminis papyraceis in sicco pallide 

 olivaceis anguste ellipticis, 8-10 mm. longis, 3-4.5 mm. latis, basi et apice 

 obtusis, margine subplanis, interdum apicem versus obscure puberulis et subtus 

 parce glanduloso-strigillosis, e basi obscure 3- vel 5-nerviis, costa nervis que 

 immersis vel subtus leviter prominulis; floribus solitariis axillaribus subsessili- 

 bus praeter filamentas glabris, bracteis basalibus paucis suborbicularibus maximis 

 haud 1 mm. diametro; pedicellis gracilibus haud 1 mm. longis, bracteolis apicali- 

 bus papyraceis suborbicularibus 2.5—3 mm. diametro scarioso-marginatis basi 

 imbricatis calycis tubum amplectentibus; calyce sub anthesi 2.5-3 mm. longo et 

 apice diametro, tubo obtuse angulato circiter 1.5 mm. longo, limbo erect o-p ate nte 

 4-lobato, lobis deltoideis circiter 1 x 1.5 mm„ subacutis; disco annulari-pulvinato; 



