ROWLEE: GENUS CosTUS IN CENTRAL AMERICA — 285 
DD. tee small; leaves about 16 cm. 
g (Mexico, Costa Rica and Pana- 
pice ae eke a ele eet ee. eee 4. C. hirsutus. 
GG; Spikes teased red. 
D. Appendages ie bracts lanceolate, 
ae ee upper sterile erect; 
leaves glabrous (Guatemala and Costa 
Ri 
1A enters iert oan amet eS es 5. C. Bakert. 
DD. Appendages of bracts broadly ovate; 
leaves scabrous (Costa Rica) ...... 6. C. lima. 
BB. Bracts of spikes not appendiculat 
&: a lacking on back of aie (Costa 
PUM) Chee eee eee icicle ea 7. C. Malortieanus. 
CL. Callose present on back of bra 
D. Spike ovoid; leaves sessile yee 8. C. pulverulentus. 
DD. Sih fusiform (Costa Rica an 
(suatemiala) sce a ae he ties 
DDD. sae eplindinical or spherical. 
E. Plants small, about 2 m. high. 
. C. sanguineus. 
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us. 
Spike red, cylindrical 
(Costa Ricaand Panama) Io. C. spicatus. 
GG. Sp eo green, spherical 
(Guatemala) i. 25 oboe: 11. C. congestus. 
FF. Leaves oe beneath (Costa 
Patiama ) 0s. 12. C. nutans. 
Ric 
EE. Plant large, much more than 2 m. 
high. 
F. Labellum orange-red 
yellow markings (Costa Rica 
and Guatemala). <. 4.4.2: 13. C. splendens. 
. Costus bracteatus sp. nov. 
Plant clothed a long black hairs; —— culms up to 2 m. 
high, the lower leaves reduced to sheathing scales; flowering 
culms 40 cm. tall, the leaves geetich eines except the four 
or five uppermost, which bear small baie and closely surround 
the spike. Uppermost teaver Di on the sterile culms large and thin, 
32 cm. long, 7 cm. wide, oblanceolate, acuminate at the apex 
and tapering below evenly to an acute base, ~~ hairy 
on both sides, the hairs arising from a bulbous midrib 
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ginous-tomentose; ligules 5-10 mm. long, tomentose; sheaths 
* This fraction indicates that there are 3.5 primary and 23 secondary veins 
to the centimeter. 
