Calycobolus glaber

Nomenclature

Accepted name/Authority/Place of publication: 

Calycobolus glaber (Kunth) House, Bull. Torrey Bot. Club 34:  145 (1907). 

Synonyms: 

Dufourea glabra Kunth in Humb., Bonpl. & Kunth, Nov. Gen. & Sp. 3:  114 [folio ed. p. 89]. (Feb. 1819).

Reinwardtia glabra (Kunth) Spreng., Syst. Veg. 1:  863 (1824 [title page ‘1825’]). 

Prevostea glabra (Kunth) Choisy, Ann. Sci. Nat. 4:  498 (1825). TYPE. Venezuela, Amazonas: crescit prope San Francisco Solano, ad ripam Cassiquiares (Missiones del Orinoco), fl. May, Humboldt s.n. (iso P(×3), fragment in F; B-W 4205 [as Humboldt 5091]).

Calycobolus pulchellus Willd. ex Roem. & Schult., Syst. Veg. 5:  4. (Dec. 1819).  TYPE. Venezuela, Amazonas: ad Cassiquiares, prope San Francisco Solano, Humboldt 5091 (holo B-W 4205; iso P(×3), fragment in F). 

Prevostea amazonica Choisy in DC., Prodr. 9: 437 (1845).  

Prevostea glabra var. amazonica (Choisy) Meisn. in Mart., Fl. Bras. 7: 324 (1869).  

Calycobolus amazonicus (Choisy) House, Bull. Torrey Bot. Club 34: 145 (1907). TYPE. Brazil. Amazonas: in sylvis ad Manacuru dit. Japurensis prov. R[io] N[egro], Martius 3095 (holo M, on 2 sheets; photo GH).

Description

Habit: 
Lianas; stems twining, to 7 m long, terete, brown, glabrous.
Leaves: 
Leaves with petioles 10–16 mm long, appressed sericeous or glabrescent; blades elliptic, elliptic-oblong, or broadly elliptic, 5–17 cm long, 3–6 cm wide, base obtuse or rounded to subcordate, apex obtuse to acuminate or retuse, mucronulate, glabrous on both sides; lateral veins 5–7 per side.
Inflorescences: 
Inflorescences umbelliform, usually 3–11-flowered; peduncles 12–18 cm long, glabrate; lowermost 1 or 2 bracts in inflorescence (i.e., at apex of peduncle) foliaceous, elliptic, 6–13 mm long, persistent; bracteoles squamiform, 1–2 mm long, deciduous; pedicels 10–16 mm long.
Flowers: 
Flowering sepals very unequal, outer 2 much larger than inner, reniform to orbicular-cordate, 17–22 mm long, 19–25 mm wide, base cordate, apex rounded, chartaceous, glabrous, venation reticulate; inner sepals smaller, elliptic, ovate, or obovate, 4–6 mm long, tightly enclosing corolla tube base; corollas tubular-funnelform, c.2 cm long, pure white or less often limb pale yellowish or pale bluish, outside glabrous or interplicae with few scattered sericeous hairs, corolla lobes obtuse, erect; stamens included, filaments 10–13 mm long, anthers linear-oblong, 3–4 mm long, white or yellow; ovary shortly ovoid, glabrous, styles 2, fused basally less than half their length, free above, glabrous, stigmas globose-capitate, green.
Fruits: 
Fruiting calyx accrescent and persistent, outer 2 sepals 23–28 mm long, 26–31 mm wide, papery, brown to straw-colored, tightly appressed together with fruit cupped at base. Utricle-like fruits depressed-globose to subquadrangular, 2-celled, 6–7 mm long, brown to maroon, glabrous, papery, apex retuse, apiculate with persistent style base.
Seeds: 
Seeds 4 or less, ovoid to ellipsoid, keeled on inner face, 2.5–3 mm long, glabrous, black, surface granulose, apex truncate to flattened.
Author: 
Staples, G.W. & D.F. Austin.
References: 

Staples, G.W. & D.F. Austin. 2009. Revision of neotropical Calycobolus and Porana (Convolvulaceae). Edinb. J. Bot. 66: 133–153.

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

Known from Colombia, Venezuela, Guyana, Peru, Bolivia, and Brazil. (map). 

Ecology: 

Occurring in selva
virgen siempre verde and along or above watercourses, in shrubby areas with
some trees, varzea forests, on terra firme, and in capoeira.
Soil types have been noted as moist clay and solo argiloso. Elevation:
120–480 m. 

Phenology: 

Months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Flowering specimens

4

3

1

–

5

3

4

2

–

1

1

Fruiting specimens

–

1

1

1

5

–

3

4

–

2

1

1
Author: 
Staples, G.W. & D.F. Austin.
References: 

Staples, G.W. & D.F. Austin. 2009. Revision of neotropical Calycobolus and Porana (Convolvulaceae). Edinb. J. Bot. 66: 133–153.

Other information

Common names and uses: 
Flor de rabipelado (Venezuela, ex Liesner 3823)

Authorship for webpage

Editor: 
George Staples, Esmond Er
Contributors: 
Classification: 
Calycobolus glaber
Fri, 2011-09-23 04:37 -- Esmond
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