LUNDELL: THE GENUS PARATHESIS 19 
2. Margin of leaves entire to crenulate. 
3. Hairs of branchlets and undersurface of leaves stellate or dendroid 
apically, rays erect and spreading. 
4. Leaves oblanceolate, subacuminate, the acumen obtuse; fruits 
pubescent over entire surface (Oaxaca) ...46. P. Schultesii. 
4. Leaves lanceolate, acuminate; ovary glabrous below (Guatemala) 
nis stokes aia ideale morals Mikal aue alleen ei 47. P. pleurobotryosa. 
3. Hairs of branchlets and undersurface of leaves predominately dendroid, 
multibranched usually to base. 
5. Leaves obovate, abruptly acuminate, the acumen obtusish; sepals 
less than 1 mm. long; pedicels 1.5-3 mm. long (Oaxaca, Veracruz) 
jiniicte dca cae Obes i eek es 4s 48. P. Oerstediana. 
5. Leaves lanceolate, elliptic or oblanceolate, apex acuminate; sepals up 
to 2.5 mm. long; pedicels 3-12 mm. long. 
6. Leaves floccose-tomentose beneath, at least along midvein; 
petals up to 5 mm. long; filaments 1.5-2 mm. long (Chiapas, 
(SUSIOINAIE).. ee ee 49. P. reflexa. 
6. Leaves tomentose beneath over entire surface, not floccose; 
petals up to 7 mm. long; filaments 2.5-4 mm. long (Chiapas, 
Guatemala, Costa tical... .-.... 50. P. calophylla. 
1. Pubescence of branchlets and undersurface of leaves consisting of fine sessile 
stellate hairs usually with appressed rays (sometimes dendroid in P. leptopa) 
Series 14-23. 
Pew Yel oor Oy Tal Deer ag Sea ek ple toe wae eT an yee Bee Se cr eae Say eT er en Pk aa a ee ag, ee ees SE tS et Se Na 
Series 14-23 
7. Anthers usually large, broad and thick, ovate-lanceolate, conspicuously 
punctate; filaments mostly stout, and shorter than anthers. 
8. Anthers with dorsal area conspicuously black-punctate, usually with 
large glands; filaments usually stout, usually much shorter than 
anthers. 
9. Inflorescences short villous; flowers usually 5-merous, rarely 4- 
merous. 
10. Pistil short villous at apex of ovary and at base of style; petals 
papillose-tomentose over entire inner surface; stamens up to 
3.8 mm. long (Durango, Guerrero, Jalisco, Mexico, Michoa- 
BG NOR) a ia ay bes 51. P. villosa. 
10. Pistil glabrous; petals glabrous at base within; stamens up to 
oe thi. One OR OOR), a cs 52. P. Conzattiz. 
9. Inflorescences puberulent or tomentulose; flowers usually 5-merous, 
rarely 6-merous. 
11. Leaves linear-lanceolate, up to 30 cm. long, 5 cm. wide, apex 
acuminate, margin crenulate-denticulate (Guatemala)...... 
A a i ek ee es 53. P. stenophylla. 
11. Leaves elliptic or oblanceolate, apex subabruptly acuminate, 
margin entire or obscurely crenulate. 
12. Panicles 2- or 3-branched (Colombia, Venezuela).......... 
54. P. venezuelana. 
reeds ieee gee aa hal War tae cel eee ee cae cis See ee pet ae ge et el Me ae a ee Oe 
12. Panicles 1- or 2-branched. 
