Taxonomic revision of Croton section Cleodora (Euphorbiaceae)
Author
Caruzo, Maria Beatriz Rossi
Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Cx. Postal 11461, 05422 - 970, São Paulo, SP, Brazil Current address: Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Diadema, SP, Brazil. E-mail: mbrcaruzo @ unifesp. br Instituto de Botânica, Secretaria do Meio Ambiente, Cx. Postal 3005, 01061 - 970, São Paulo, SP, Brazil
Author
Cordeiro, Inês
text
Phytotaxa
2013
2013-08-07
121
1
1
41
http://dx.doi.org/10.11646/phytotaxa.121.1.1
journal article
10.11646/phytotaxa.121.1.1
1179-3163
5079382
18.
Croton spruceanus
Bentham (1854: 375)
(
Fig. 7G–M
). Type:—
BRAZIL
. Amazonas: Among inundated rocks at the falls of San Gabriel, January-August 1852,
R. Spruce 2205
(
holotype
K!, isotypes A!, NY!, MO!, P!).
Croton calycularis
Huber (1914: 181)
. Type:—
BRAZIL
. Pará: 'Hab. In silvis editis ad fl. Cumina-mirim', 13 December
1906,
A. Ducke
s.n.
(
holotype
MG
[7946]!, isotype RB!)
.
Shrubs ca.
3 m
tall; latex clear; stellate, appressed-stellate, stellate-lepidote and dendritic trichomes; branchlets cylindric, slightly striate, floccose, dendritic trichomes. Leaves discolorous, with a pair of sessile saucershaped orange basilaminar glands; lamina 4–16 ×
0.7–8.5 cm
, elliptical to ovate, rarely ovate-lanceolate, apex acuminate to long acuminate, base rounded, margin inconspicuously serrate, with glands; upper surface glabrescent, simple trichomes, stellate trichomes on midvein, lower surface pubescent, chalky, pale appressedstellate porrect trichomes; venation pinnate, brochidodromous; petiole
0.3–2.5 cm
long; stipules subulate, ca.
3 mm
long. Inflorescences
4–18 cm
long, terminal, lax; inflorescence axis slightly flattened, striate, floccose, dendritic trichomes; proximal cymules bisexual, with 1 pistillate flower and 1 staminate flower, distal cymules with 1 staminate flower; bracts ca.
2 mm
long, entire, linear-lanceolate, prophylls inconspicuous. Staminate flowers
0.6–1cm
long, campanulate, pedicellate; pedicels
1–4 mm
long; calyx ca.
4 mm
long, pubescent externally, ferrugineous, appressed-stellate and stellate-lepidote trichomes, glabrate internally; calyx lobes 5, united up to half of their length, then free for ca.
2 mm
, entire, equal, inconspicuously imbricate, ovate to triangular, apex acute, margin villose; petals ca.
5 mm
long, elliptical to oblong, apex obtuse to rounded, wavy, villose externally; disk 5-segmented; stamens ca. 15, filaments subulate, villose at the base, anthers ellipsoid; receptacle villose with simple trichomes. Pistillate flowers ca.
1.1 cm
long, urn-shaped, pedicellate; pedicels ca.
4 mm
long; calyx ca.
7 mm
long, pubescent externally, ferrugineous, appressed-stellate and stellatelepidote trichomes, glabrate internally; calyx lobes 5, united almost at the apex, then free for ca.
1 mm
long, entire, equal, inconspicuously imbricate, ovate, apex acute; petals absent; disk entire, flatly 5-lobed; ovary globose, appressed-stellate and stellate-lepidote trichomes; styles 3, 4-fid, united at the base, each one entire up to almost in their entire length, then branching into 12 terminal arms, covered by appressed-stellate and stellate-lepidote trichomes, included in calyx. Fruits ca.
1.8 cm
long, subglobose, slightly warty, trichomes appressed-stellate and stellate-lepidote trichomes, calyx lobes conspicuously accrescent, inflated in young fruit, revolute in mature fruit; seeds ca.
6 mm
long, ellipsoid, ribbed.
Distribution and habitat:
—It occurs in
Ecuador
,
Colombia
,
Venezuela
,
Bolivia
and
Brazil
, in “terra firme” and flooded forests of the Amazon and Andean regions, growing from 50 to approximately
1800 m
elevation.
Phenology:—
Flowering in January–June and August–December; fruiting in February–June, August– October and December.
Taxonomic notes:
—
Croton spruceanus
can be recognized in the field by its discolorous leaves, facing down, besides its erect inflorescences and pistillate calyx lobes conspicuously accrescent and inflated in young fruit.
Selected specimens examined:
—
COLOMBIA
.
Cauca
:
Cali
,
Villa Carmelo
,
1700 m
, fl., fr.,
15 May 1982
,
H.
Murphy
393
(COL, NY, US)
.
VENEZUELA
.
Zulia
:
Lagunillas
, cuenca del
Embalse Burro Negro
(Pueblo Viejo), laderas occidentales
de la
Serrania de Ziruma
o
El Empalado
, a lo largo del
río Grande
, unos
13 km
al norte del
Embalse
, aprox.
Lat.
10°25’N
.,
Long.
70°49’O
., en bosque siempreverde original,
550–600 m
.,
1–5 April 1982
,
G.S. Bunting
et al. 11184
(HERZU,
NY
)
.
BRAZIL
.
Pará
:
Capanema
,
rio Quatipuru
, in vicinity of
Mirasselvas
, ca.
30km
by road west of
Bragança
, elev.
50m
, ca.
1°04’S
e
46°59’W
, fr.,
9 April 1980
,
G. Davidse
et al. 18100
(DAV, INPA, MG, MO, NY, US)
.
ECUADOR
.
Morona-Santiago
:
La Mision
,
Salesiano
,
5 km
al S del
Rio Bomboiza
y cerca la carretera
Zamora-Gualaquiza
,
800 m
, fl., fr.,
31 October 1985
,
M.A.
Baker
& J.
Zaruma
6493
(
MO
)
.
BOLIVIA
.
Velasco
,
Parque Nacional Noel Kempff Mercado
, a
15 km
Del Campamento Los Fierros
,
14°37’02’’S
,
60°50’05’’W
,
200 m
, fr.,
3 March 1997
,
S. Jimenez
et al. 1127
(DAV, MO,
USZ
)
.