Piper hostmannianum

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Piper hostmannianum

Content

<<<Stipules>Blade>Base>Differential distance

0-0.7 cm1
1. 004-002-005-001

<<Inflorescences>Peduncle>Length

1 cm long, to 1.5 cm in fruit2
2. 005-002-001

<<Inflorescences>Spikes>Length

10-12 cm long3
3. 005-003-001

<<Infructescences>Fruits>Stigma

stigmas 3, sessile.4
4. 006-003-001

<<Stipules>Blade>Apex

apex acuminate,5
5. 004-002-004

<<Stipules>Blade>Base

base unequally attached to petiole difference , obtuse, rounded to subcordate, sometimes acute, glabrous above, below densely appressed pubescent on veins;6
6. 004-002-005

<<Stipules>Blade>Dimensions

10-25 x 2.5-13 cm7
7. 004-002-002

<<Stipules>Blade>Margins

margin not ciliate,8
8. 004-002-003

<<Stipules>Blade>Shape

broadly elliptic or broadly to narrowly ovate9
9. 004-002-001

<<Stipules>Petiole>Length

0.5-1(-1.5) cm long10
10. 004-001-001

<Habit>Height

to 7 m tall11
11. 001-001

<Inflorescences>Floral bracts

floral bracts densely crowded, spirally arranged, densely marginally fringed.12
12. 005-004

<Inflorescences>Growth form

erect13
13. 005-001

<Inflorescences>Peduncle

peduncle , crisp-pubescent;14
14. 005-002

<Inflorescences>Spikes

spike , white or yellow;15
15. 005-003

<Infructescences>Fruits

fruits oblongoid or trigonous, glabrous to puberulent at apex,16
16. 006-003

<Infructescences>Length

to 12 cm long17
17. 006-001

<Infructescences>Width

4 mm wide18
18. 006-002

<Stipules>Blade

blade not conspicuously glandular-dotted, shiny, , , (old leaves often broader than young ones),19
19. 004-002

<Stipules>Petiole

petiole , crisp-pubescent, vaginate to apex;20
20. 004-001

<Stipules>Veins

pinnately veined, secondary veins 3-6 per side, originating from lower 3/4 of primary vein, at an angle of 60º, anastomosing, soon abruptly ascending at an angle of 120º, intersecondaries conspicuous, tertiary veins widely reticulate.21
21. 004-003

Common Name

English (French Guiana): akamikini, apoucou man limbe limbe English (Suriname): ampuku wi, wetu njaisa

Description

Shrub, subshrub or treelet to 7 m tall. Stem crisp-pubescent. Prophyll glabrous, marginally with some hairs or densely pubescent. Stipules rather long persistent; petiole 0.5-1(-1.5) cm long, crisp-pubescent, vaginate to apex; blade not conspicuously glandular-dotted, shiny, broadly elliptic or broadly to narrowly ovate, 10-25 x 2.5-13 cm, (old leaves often broader than young ones), margin not ciliate, apex acuminate, base unequally attached to petiole difference 0-0.7 cm, obtuse, rounded to subcordate, sometimes acute, glabrous above, below densely appressed pubescent on veins; pinnately veined, secondary veins 3-6 per side, originating from lower 3/4 of primary vein, at an angle of 60º, anastomosing, soon abruptly ascending at an angle of 120º, intersecondaries conspicuous, tertiary veins widely reticulate. Inflorescence erect; peduncle 1 cm long, to 1.5 cm in fruit, crisp-pubescent; spike 10-12 cm long, white or yellow; floral bracts densely crowded, spirally arranged, densely marginally fringed. Infructescence green, to 12 cm long, 4 mm wide; fruits oblongoid or trigonous, glabrous to puberulent at apex, stigmas 3, sessile.

Distribution

Guianas present, northern S America present
Northern S America; one of the most common species in the Guianas; over 250 collections studied (GU: 130; SU: 36; FG: 98).

Habit

Shrub, subshrub or treelet .22
22. 001

Individuals Association

Piste de Risque-tout, Skog 5619 Guyana, Rupununi Distr., Kuyuwini Landing, Jansen-Jacobs et al. 2922 Suriname, Kabalebo dam area, Lindeman & Görts-van Rijn et al. 247 Guyana, Bartica-Potaro road, Sandwith 1153 Saül, Carbet Mais, Prance 28104 Suriname, Man kaba, Sauvain 559

Inflorescences

Inflorescence ;23
23. 005

Infructescences

Infructescence green, , ;24
24. 006

Notes

Seedlings often have a pale green band along the primary vein.
After having studied many recent collections that show a great variation in leaf shape, I cannot maintain a separate var. ramiflorum, based on leaf measures alone.
Piper hostmannianum can be distinguished from P. trichoneuron by indument characters. Hairs on veins below are appressed-pubescent in P. hostmannianum and crisp-pubescent in P. trichoneuron.

Prophyllum

Prophyll glabrous, marginally with some hairs or densely pubescent.25
25. 003

Stems

Stem crisp-pubescent.26
26. 002

Stipules

Stipules rather long persistent;27
27. 004