Piper angustifolium

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Piper angustifolium

Content

<<Inflorescences>Peduncle>Length

0.2-0.4(-0.7) cm long1
1. 004-002-001

<<Inflorescences>Spikes>Dimensions

to 1 x 1.5 cm2
2. 004-003-001

<<Infructescences>Fruits>Stigma

stigmas 3(-4?), sessile.3
3. 005-001-002

<<Infructescences>Fruits>Width

ca. 2.5 mm wide (when dried)4
4. 005-001-001

<<Stipules>Blade>Apex

apex long-acuminate,5
5. 003-002-004

<<Stipules>Blade>Base

base equal or almost equally attached to petiole, acute, glabrous;6
6. 003-002-005

<<Stipules>Blade>Dimensions

5-11 x 1-2.8 cm7
7. 003-002-003

<<Stipules>Blade>Shape

narrowly lanceolate8
8. 003-002-002

<<Stipules>Blade>Texture

not scabrous9
9. 003-002-001

<<Stipules>Petiole>Length

0.1-0.4 cm long10
10. 003-001-001

<Habit>Height

to 1.5 m tall11
11. 001-001

<Inflorescences>Floral bracts

floral bracts cucullate, glabrous.12
12. 004-004

<Inflorescences>Growth form

erect13
13. 004-001

<Inflorescences>Peduncle

peduncle , retrorsely pubescent;14
14. 004-002

<Inflorescences>Spikes

spike almost globose, , apiculate;15
15. 004-003

<Infructescences>Fruits

fruits depressed globose or obovoid, , glabrous,16
16. 005-001

<Stipules>Blade

blade , not conspicuously glandular-dotted, , ,17
17. 003-002

<Stipules>Petiole

petiole , vaginate at base, retrorsely pubescent;18
18. 003-001

<Stipules>Veins

pinnately veined, secondary veins 6-10 per side, originating from throughout primary vein, plane above, prominulous below, anastomosing well within margin.19
19. 003-003

Description

Shrub or subshrub to 1.5 m tall. Stem retrorsely pubescent with swollen nodes. Stipules ovate-lanceolate, often rather long persistent; petiole 0.1-0.4 cm long, vaginate at base, retrorsely pubescent; blade not scabrous, not conspicuously glandular-dotted, narrowly lanceolate, 5-11 x 1-2.8 cm, apex long-acuminate, base equal or almost equally attached to petiole, acute, glabrous; pinnately veined, secondary veins 6-10 per side, originating from throughout primary vein, plane above, prominulous below, anastomosing well within margin. Inflorescence erect; peduncle 0.2-0.4(-0.7) cm long, retrorsely pubescent; spike almost globose, to 1 x 1.5 cm, apiculate; floral bracts cucullate, glabrous. Infructescence erect, green; fruits depressed globose or obovoid, ca. 2.5 mm wide (when dried), glabrous, stigmas 3(-4?), sessile.

Distribution

French Guiana present, Rio Madeira present, Southern America: Brazil North (Amazonas present), Suriname present
Suriname, French Guiana and Brazil (Amazonas, Rio Madeira); ca. 30 collections studied, many sterile (SU: 1; FG: 30).

Habit

Shrub or subshrub .20
20. 001

Individuals Association

Hahn 3633 Suriname, s.l., UVS 17835 Sinnamary R., de Granville et al. 194 de Granville et al. 2734 Saül area, Skog & Feuillet 7271 Nouragues Station, Feuillet 4417 Trinité Mts., de Granville et al. 6219

Inflorescences

Inflorescence ;21
21. 004

Infructescences

Infructescence erect, green;22
22. 005

Notes

In the Paris herbarium I have seen Richard s.n., an isotype. It is in a small bag and consists of two leaves, two young spikes and a stem fragment. It agrees well with the description. I have not seen the holotype and do not know where it is.
Piper angustifolium can be distinguished from P. anonifolium and P. eucalyptifolium by retrorsely pubescent stems, whereas in P. anonifolium and P. eucalyptifolium stems are glabrous, except for lines of hairs.
Comparing the descriptions and the collections at hand of P. angustifolium and P. piresii Yunck. from N Brazil I conclude that they probably belong to one species. A final conclusion can only be made after studies of the type. Both are small shrubs with swollen nodes, glabrous leaves, retrorsely pubescent stems, etc. and very short spikes with cucullate, glabrous floral bracts.

Stems

Stem retrorsely pubescent with swollen nodes.23
23. 002

Stipules

Stipules ovate-lanceolate, often rather long persistent;24
24. 003