An Enumeration of the Plants collected by Dr. H. H. Rusby in South 
America, 1885-1886, XXXII 
By H. H. RusBy 
(Continued from Bull. Torrey Club, 28: 313. 21 My. 1901) 
BURMANNIACEAE 
Burmannia tenella Benth. Kew Journ. 7: 10. 1855. Yungas, 
_ 6000 ft. (no. 858) and Mapiri, 2500 ft., May 1886 (no. 859). 
Growing in leaf mould, in deep forest shade. fork 
Ayre 
SCITAMINEAE 2 
Costus spicatus (Jacq.) Sw. Prod. Veg. Ind. Occ. 11. Yungas, 
6000 ft., 1885 (no. 1295). Growing in a ravine, in deep shade. 
(Same as Bang’s nos. g12 and 1248.) 
Costus Guanaiense sp. nov. 
Leaf-sheaths densely and long appressed yellowish-hirsute : 
stems 6-8 dm. high, very stout, leafy at the top: leaf-blades ° 
2.5-3 dm. long, 5 or 6 cm. broad, oblong, short-acuminate : floral 
bracts about 5 cm. long, 3 cm. broad, thick, rigid, brown, strongly 
nerved, the foliaceous tips about 1 cm. long, 6 or 7 mm. broad, 
obtusish, appressed or reflexed at the tip: fruit densely yellowish- 
_ Sericeous, 1.5 cm. long, and more than half as broad, oval or 
slightly broader above, the fruiting calyx-segments 1.75 cm. long, 
about half as broad, oval, thick, rigid, about 15-ribbed, the ribs 
strong and sharp; seed black, 2.5 mm. long, broadly oval, 
coarsely and bluntly tuberculate. 
Guanai, 2000 ft., May 1886 (no. 2225). 
Costus phlociflorus sp. nov. 
_ Minutely puberulent under the lens. Stems erect, slender for 
the genus, about 4 dm. high, leafy only at the summit, clothed 
with bladeless sheathes below: leaves 1-1.5 dm. long, 3-4 ©™: 
broad, oblanceolate or obovate, rather abruptly acuminate and 
acute: floral bracts 2-2.5 cm. long, closely surrounding the 
_ perianth-tube, abruptly keeled near the summit with a broad 
yellowish keel about 5 mm. long, about 19-nerved, the nerves 
very fine: perianth bright crimson, drying deep-purple, the See" 2... 
694 
e : -ments horizontally spreading, 1-2 cm. long and nearly as broad. SS : 
