Pyrostria lobulata Bridson

Species

Angiosperms > Gentianales > Rubiaceae > Pyrostria

Characteristics

Shrub or small tree 3–8 m. tall, glabrous; young stems square, very slightly winged, covered with grey or fawn bark.. Leaf-blades turning black-brown when dry, broadly elliptic, 2.5–13.5 cm. long, 1–6 cm. wide, acute to obtuse at apex, acute or sometimes rounded and often slightly unequal at base, subcoriaceous, dull above; lateral nerves in (5–)6 main pairs; tertiary nerves obscure; domatia present as inconspicuous tufts of hair in the nerve axils or sometimes absent; petiole 0.2–1 cm. long; stipules triangular to triangular-ovate, 5–10 mm. long, caduous.. Flowers unisexual or ? sometimes hermaphrodite, 4-merous, borne in pedunculate umbels, functionally ♂ flowers 15–30, functionally ♀ flowers perhaps fewer; peduncles 4–7 mm. long; pedicels 3–4 mm. long, glabrescent to pubescent; bracts paired at apex of peduncle, connate at base, ovate, 5–7 mm. long, acuminate, pubescent near base inside.. Calyx-tube in ♂ or hermaphrodite ± globose up to 1 mm. in diameter, possibly ribbed in ♀ judging from very immature fruit; limb a reduced rim, truncate or bearing unequal lobes up to 1 mm. long.. Corolla cream or greenish white; tube 2 mm. long, the throat congested with crisped hairs; lobes ovate-triangular, 2–2.5 mm. long, 1–1.25 mm. wide at base, shortly apiculate.. Style very slightly longer than corolla-tube; stigmatic knob ± globose, ± 0.5 mm. in diameter.. Disk not prominent.. Fruits usually borne in umbels of 3–10, distinctly bilobed, with a lateral small lobe on either side of each lobe (tending to disappear on drying), 7–8 mm. long, 0.75–1.3 cm. wide, distinctly indented at apex; pyrene narrowly obovoid, 6 mm. long, 3.25 mm. wide, with a shallow wing around apex, scarcely rugulose.. Figs. 131/4, 18, p. 752 & 158.
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Leaves black-brown when dry; blades 2.5–13.5 × 1–6 cm, acute to obtuse at apex, acute or sometimes rounded and often slightly unequal at base, subcoriaceous, dull above; lateral nerves in (5)6 main pairs; tertiary nerves obscure; domatia present as inconspicuous tufts of hair in the nerve axils, or sometimes absent; petiole 2–10 mm long; stipules 5–10 mm long, triangular to triangular-ovate, caducous.
Flowers unisexual, or ?sometimes hermaphrodite, 4-merous, borne in pedunculate umbels; functionally male flowers 15–30, functionally female flowers perhaps fewer; peduncles 4–7 mm long; pedicels 3–4 mm long; glabrescent to pubescent; bracts 5–7 mm long, ovate, acuminate, pubescent near the base inside.
Calyx tube in functionally male or hermaphrodite flowers, ± globose, up to 1 mm in diameter, possibly ribbed in functionally female flowers judging from very immature fruit; limb a reduced rim, truncate or bearing unequal lobes up to 1 mm long.
Fruits usually borne in umbels of 3–10, 7–8 × 7–13 mm, distinctly bilobed, with a small lobe on either side of each lobe (tending to disappear on drying), distinctly indented at the apex.
Corolla cream or greenish-white; tube 2 mm long, congested with crisped hairs at throat; lobes 2–2.5 × 1–1.25mm, ovate-triangular, shortly apiculate.
Shrub or small tree 3–8 m tall, glabrous; young stems square, very slightly winged, covered with grey or fawn-coloured bark.
Pyrene 6 × 3.25 mm, narrowly obovoid, with a shallow wing around the apex, scarcely rugulose.
Pollen presenter ± globose, c. 0.5 mm in diameter.
Style very slightly longer than corolla tube.
Life form -
Growth form tree
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Foliage retention deciduous
Sexuality hermaphrodite
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Mature height (meter) 3.0 - 8.0
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Environment

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Hardiness (USDA) 9-12

Usage

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Edible -
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Cultivation

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Distribution

Pyrostria lobulata world distribution map, present in Rwanda, Tanzania, United Republic of, and Zambia

Conservation status

Pyrostria lobulata threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:932413-1
WFO ID wfo-0000289285
COL ID 4QVFV
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Pyrostria lobulata