Peperomia quadrangularis

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Peperomia quadrangularis

<<Inflorescences>Peduncle>Length

0.5-4 cm long1
1. 004-003-001

<<Inflorescences>Spikes>Length

up to 6 cm long2
2. 004-004-001

<<Leaves>Blade>Apex

apex obtuse, rounded or slightly acute,3
3. 003-002-005

<<Leaves>Blade>Base

base acute to rounded, dark green above, with paler veins beneath, minutely puberulent above, sparsely so and glabrescent beneath;4
4. 003-002-006

<<Leaves>Blade>Dimensions

1-4.5 x 0.8-2.2(-2.7) cm5
5. 003-002-003

<<Leaves>Blade>Margins

margin ciliate,6
6. 003-002-004

<<Leaves>Blade>Shape

broadly elliptic, obovate or orbicular7
7. 003-002-002

<<Leaves>Blade>Texture

fleshy coriaceous8
8. 003-002-001

<<Leaves>Petiole>Length

0.1-0.5 cm long9
9. 003-001-001

<<Stems>Internodes>Length

2-6 cm long10
10. 002-001-001

<Inflorescences>Floral bracts

floral bracts rounded or oblong, glabrous, glandular;11
11. 004-005

<Inflorescences>Growth form

erect12
12. 004-001

<Inflorescences>Peduncle

peduncle not slender, , pubescent, 2-bracteate, red, brownish or green;13
13. 004-003

<Inflorescences>Position

axillary or occasionally terminal14
14. 004-002

<Inflorescences>Rachises

rachis strongly ridged (at least when dried).15
15. 004-006

<Inflorescences>Spikes

spike , green or yellow-green, laxly to moderately flowered;16
16. 004-004

<Leaves>Blade

blade , , ,17
17. 003-002

<Leaves>Petiole

petiole , glabrous or minutely pubescent;18
18. 003-001

<Leaves>Veins

palmately 3-veined, veins impressed above, prominent beneath.19
19. 003-003

<Stems>Internodes

internodes , green brownish or reddish.20
20. 002-001

Description

Epiphytic or epilithic herb, creeping or hanging, sometimes mat-forming. Stem quadrangular, minutely pubescent, internodes 2-6 cm long, green brownish or reddish. Leaves opposite, basely attached; petiole 0.1-0.5 cm long, glabrous or minutely pubescent; blade fleshy coriaceous, broadly elliptic, obovate or orbicular, 1-4.5 x 0.8-2.2(-2.7) cm, margin ciliate, apex obtuse, rounded or slightly acute, base acute to rounded, dark green above, with paler veins beneath, minutely puberulent above, sparsely so and glabrescent beneath; palmately 3-veined, veins impressed above, prominent beneath. Inflorescence erect, solitary or two together, axillary or occasionally terminal; peduncle not slender, 0.5-4 cm long, pubescent, 2-bracteate, red, brownish or green; spike up to 6 cm long, green or yellow-green, laxly to moderately flowered; floral bracts rounded or oblong, glabrous, glandular; rachis strongly ridged (at least when dried). Fruits somewhat sunken when young, slightly stipitate when ripe, ovoid, smooth and shiny (in vivo) brown, upper half often grayish, verruculose or papillate, with apical stigma.

Distribution

Southern America: Panamá (Panamá present), northern S America present
West Indies, Panama and northern S America; over 50 collections studied (GU: 34; SU: 15; FG: 4).

Fruits

Fruits somewhat sunken when young, slightly stipitate when ripe, ovoid, smooth and shiny (in vivo) brown, upper half often grayish, verruculose or papillate, with apical stigma.21
21. 005

Habit

Epiphytic or epilithic herb, creeping or hanging, sometimes mat-forming.22
22. 001

Individuals Association

Suriname, Sipaliwini savanna, Oldenburger et al. 497 Suriname, Bakhuis Mts., Florschütz & Maas 2783 Guyana, NW Kanuku Mts., Iramaikpan, A.C. Smith 3023 Grand Inini R., de Granville et al. Mana R., Baboune Cr., de Granville et al. 4695 Guyana, Kanuku Mts., Rupununi R., Puwib R., Jansen-Jacobs et al. 213

Inflorescences

Inflorescence , solitary or two together, ;23
23. 004

Leaves

Leaves opposite, basely attached;24
24. 003

Notes

Collections from adjacent Brazil (Pará) had been identified Peperomia muscosa Link. There seem to be no significant differences with P. quadrangularis. Yuncker (Hoehnea 4: 139. 1974) already suggested that the two may belong to one species. After having seen the variation in leaf shape and studied the types of P. muscosa and P. quadrangularis, G. Mathieu and I are convinced that the two are conspecific.
Peperomia quadrangularis could be mistaken for P. maguirei. For the differences see under the latter.

Stems

Stem quadrangular, minutely pubescent,25
25. 002