118 Proceedings of the Biological Society of Washington. 



places on hillsides, Loja, Ecuador, altitude 2255 meters, April 8, 1921, by 

 Wilson Popenoe (no. 1313). 



This attractive species is said to be a common shrub in the region about 

 Loja. It is a member of the Section Diotanthera, coming in the group con- 

 taining species 149 and 150 in Cogniaux's monograph, and is readily dis- 

 tinguished by its pubescence and small ovate leaves. 



Centronia tunguraguae Blake, sp. nov. 



Small tree, 6 m. high; branchlets quadrangular, flattened below the nodes, 

 4-grooved, densely ferruginous- or sordid-lepidote, becoming glabrate and 

 greenish; petioles slender, 1 to 3.5 cm. long, lepidote beneath, stellate- 

 tomentose above; blades oval or elliptic, 9 to 15 cm. long, 2.8 to 6.8 cm. wide, 

 acuminate to an obtuse apex, cuneate or somewhat rounded-cuneate at 

 base, crenate-denticulate except toward base (teeth about 30 pairs, callous, 

 obtuse, about 0.5 mm. high), subcoriaceous, above deep green, callous- 

 bullate, essentially glabrous, with impressed venation, beneath densely 

 whitish- or sordid-ferruginous-pubescent with short stellate hairs and 

 longer pinnately branched hairs, strongly 5-plinerved and prominent-reticu- 

 late; flowers in clusters of 1 to 4 in the terminal and subterminal axils, the 

 floral leaves not seen; pedicels erect, 1 to 1.5 cm. long, densely stellate-lepi- 

 dote and somewhat pilose with many-celled hairs; calyx densely ferrugin- 

 ous-stellate-lepidote and less densely ascending-pilose, in bud turbinate- 

 obovoid, obtusely apiculate, 16 mm. long, 10 mm. thick, in anthesis irregu- 

 larly calyptrate near middle, thick and subcoriaceous throughout; petals 

 6, "deep salmon-color," broadly obovate, truncate-rounded, 18 mm. long, 

 14 to 16 mm. wide, glabrous ; stamens 12, equal, the linear-subulate glabrous 

 filaments 11 mm. long, the lance-subulate anthers 8.5 mm. long, the free 

 portion of the connectives 1.5 mm. long, with a .short blunt posterior 

 appendage and a subequal blunt spur; ovary 6-celled, glabrous, depressed 

 at apex, shortly and bluntly 6-lobed; style thickish, glabrous, 2 cm. long. 



Type in the U. S. National Herbarium, no. 1067083, collected by roadside 

 at the settlement Pondoa, on slopes of Mt. Tunguragua, Ecuador, altitude 

 2745 meters, March 10, 1921, by Wilson Popenoe (no. 1296). 



In Cogniaux's monograph this species comes nearest Centronia brachycera 

 (Naud.) Triana, of Colombia, which is described as having the leaves 

 rounded at base, pedicels 5 to 10 mm. long, calyx limb thinly membran- 

 aceous, petals 2.5 cm. long, and anthers minutely appendaged dorsally. 

 The anthers in C. tunguraguae show the peculiar apparent reversal of dor- 

 sality noted by Triana' in some species of the genus, and correspond pre- 

 cisely with the figure of those of C. excelsa (Bonpl.) Triana given by Triana 

 (pi. 5, f. 59a). That species, however, is said to have 7-plinerved leaves 

 with rounded or subcordate base, and numerous herbaceous stems only 2 

 to 3 meters high. C. tunguraguae is described by the collector as rare. 



Gaultheria pubiflora Blake, sp. nov. 



Shrub 1.5 m. high; stem rimose; branches leafy, densely hispid with 

 ascending or subappressed deep brown hairs; petioles hispid, 1 to 2.5 mm. 



iTrans. Linn. Soc. 28: 165. 1872. 



