LUNDELL: THE GENUS PARATHESIS 21 
18. Pedicels elongate, slender, 5-9 mm. long; flowers up to 
+ mim, lone (Cos, Guatemala). 2 
4s Sees a ee eee 63. P. leptopa. 
16. Ovary tomentulose or puberulent apically and at base of style, 
or finely tomentulose over entire surface, the hairs never matted ; 
ovary sometimes glabrous. 
20. Inflorescences simple or 1-branched, small, slender, 3-6 em. 
long. 
21. Style 2.5 mm. Jong; ovules 3 or 4, enclosed (Oaxaca) 
ie | ee a ee 64. P. tenuts. 
21. Style 3-4 mm. long; ovules usually 7 or 8, apically exposed 
(Chiapas, Guatemala).......... 65. P. subulata. 
20. Inflorescences usually branched two or more times, sometimes 
1-branched, mostly over 10 em. long, usually much larger. 
22. Filaments papillose-puberulent or pubescent with short 
gland-tipped hairs. 
23. Filaments papillose-puberulent (Mexico). 
24. Sepals subulate, 1-1.4 mm. long; petals incon- 
spicuously punctate; leaves obovate or obovate- 
elliptic (Oaxaca)....... 66. P. Rekot. 
24. Sepals ligulate, 0.6~-1 mm. long; petals prom- 
inently punctate in lines; leaves oblanceolate, 
lanceolate, or oblong-elliptic (Chiapas, Guerrero) 
ie.) Gee. Seer oe 67. P. macronema. 
23. Filaments pubescent with short gland-tipped hairs 
(Costa Rica, Colombia, Peru, Bolivia). 
25. Anthers linear-lanceolate, up to 2 mm. long 
(Colombia)............68. P. Candolleana. 
25. Anthers lanceolate, 0.8—1.5 mm. long (Costa Rica, 
A TI so ss ote ss 
69. P. adenanthera. 
22. Filaments glabrous. 
26. Leaves mostly obovate, with lateral veins elevated 
and conspicuous beneath, usually impressed above. 
27. Peduncles of corymbs often reduced and very 
short (Mexico). 
28. Acumen of leaf obtusish, the margin of blade 
entire; pedicels up to 5 mm. long; sepals up 
to 2 mm. long; filaments 1.3-1.8 mm. long, 
subequaling or sometimes longer than 
anthers (Mexico, Oaxaca, Veracruz)...... 
Gl cas a 70. P. psychotrioides. 
28. Acumen of leaf acute, the margin of blade 
crenulate; pedicels up to 10 mm. long; 
sepals minute, 0.6-1 mm. long; filaments 
about 1 mm. long, about one half as long as 
anthers (Oaxaca, Puebla, Veracruz)....... 
71. P. melanosticta. 
he ee 6 ee 8 Oe Fe ee ee 
