View source for Dypsis subacaulis

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{{Palmbox
|image=dypsis-subacaulis53309.jpg
|image_caption=Madagascar. Photo by Dr. Rakotoarinivo Mijoro/Kew.
|genus=Dypsis (DIP-sis)
|species=<br>subacaulis (soob-ah-KAW-liss)
|subspecies=
|cultivar=
|synonyms=
|continent=africa
|habit=Solitary & clustering
|leaf_type=Pinnate
|height=
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|sun_exposure=
|watering=
|soil_type=
|common_names=
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==Habitat and Distribution==
MADAGASCAR. Toliara, Taolagnaro, Iabokoho, Tsitongambarika, Ivohibe, [[File:dypsis-subacaulis53309.jpg|thumb|left|400px|Madagascar. Photo by Dr. Rakotoarinivo Mijoro/Kew.]]about 4 km west of Antsotso village, 24° 34’ 0.8” S, 47° 12’ 14” E, alt. 182 m, 24 September 2010, M. Rakotoarinivo & J. Dransfield with S. Dransfield, Ramisy
Edmond, Mara Bergé RM531 (holotype K, isotypes MO, TAN).
==Description==
Solitary or clustering undergrowth palm, about
1 m tall, the whole palm appearing ±
acaulescent. Stem erect, very short, about 12 mm in
diam., internodes 9–10 mm long, the surface
covered with dark brown caducous
indumentum, much of the stem obscured by
marcescent leaf bases and leaf litter. Leaves
about 12 in the crown, marcescent, 60–75 cm long;
sheaths ± open throughout much of their
length, not forming a crownshaft, to 9 cm
long, about 2.5 cm wide when opened out, 2
papery triangular marcescent auricles to 7 mm
long present one each on either side at the
base of the petiole, sheath surface densely
covered with dark red-brown indumentum;
petiole 11–13 cm long, about 3.5 × 3 mm wide
near the base, tapering distally, shallowly
channelled near the base, bearing abundant
caducous dark brown indumentum; rachis
50–62 cm long; leaflets 12 or 13 on each side
of the rachis, ± regularly arranged, rather
distant, long acuminate; basal leaflets 17–19 ×
0.8–1.1 cm; mid leaf leaflets 23–28 x 1.1–1.4
cm; apical leaflets 10–12 × 0.7–0.8 cm, leaflet
surface glabrous. Inflorescence interfoliar,
spicate or with two rachillae only; prophyll
remaining hidden by the leaf sheaths, to 8 ×
0.7 cm, papery, strongly 2-keeled, tightly
sheathing; peduncular bract inserted about 3 cm
above the base, persistent, to 12 × 0.3 cm, it
and the prophyll with scattered caducous
scales; peduncle 25 × 0.11 cm, bearing
scattered caducous red-brown scales; rachilla or
flower-bearing portion of the spike 14–15 cm
long, 1.5–2.2 mm in diam., bearing crowded
triads. Staminate flowers already fallen.
Pistillate flowers to 1.7 × 0.7 mm, ovoid; sepals
rounded, about 6 mm in diam., striate; petals
imbricate, 1.2 × 1.0 mm, striate with very short
triangular tips; staminodes minute, 3,
dentiform; gynoecium ovoid, 1.4 × 0.6 mm.
Fruit not known. (Dr's. RAKOTOARINIVO, M. AND J. DRANSFIELD. 2012)/Kew. Editing by edric.


==Culture==
Cold Hardiness Zone: 10a
==Comments and Curiosities==
Dypsis subacaulis J. Dransf. & Rakotoarin., nov.
sp. Solitary or clustered undergrowth palm,
somewhat reminiscent of D. procumbens but
with very short erect stems, often appearing
acaulescent, the inflorescences spicate or
bifurcate and with narrow papery leaflets.
Type: MADAGASCAR. Toliara, Taolagnaro,
Iabokoho, Tsitongambarika, Ivohibe, M.
Rakotoarinivo & J. Dransfield with S. Dransfield,
Ramisy Edmond, Mara Bergé RM531 (holotype
K, isotypes MO, TAN) (Dr's. RAKOTOARINIVO, M. AND J. DRANSFIELD. 2012)/Kew.
This palm does not match with any known
species of Dypsis; it seems related to highly
polymorphic D. procumbens but the habit and
thin papery leaflets are distinctive.
Unfortunately we only found material with
old inflorescences. (Dr's. RAKOTOARINIVO, M. AND J. DRANSFIELD. 2012)/Kew.

Conservation status: IUCN - Critically Endangered; CR (B2ab(ii,iii,v);D).
Endemic to the Tsitongambarika forest where
fewer than 10 mature trees were recorded in
area of occupancy estimated to be less than 2
km square. Unless protected in the future,
disturbance in this forest will probably cause
decline of the population size of this species. (Dr's. RAKOTOARINIVO, M. AND J. DRANSFIELD. 2012)/Kew.

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File:dypsis-subacaulis53309.jpg|Madagascar. Photo by Dr. Rakotoarinivo Mijoro/Kew.                


File:ds109120674533.JPG|All information copyright, Royal Botanic Gardens, Kew.
File:dp665799120438.JPG|All information copyright, Royal Botanic Gardens, Kew.
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==External Links==
*[http://eunops.org/content/glossary-palm-terms Glossary of Palm Terms]
*[http://www.calflora.net/botanicalnames/pronunciation.html MODERN BOTANICAL LATIN]
*[http://www.jlhudsonseeds.net/Pronunciation.htm "Just To Be Clear"]
==References==
Phonetic spelling of Latin names by edric. 

Special thanks to Geoff Stein, (Palmbob) for his hundreds of photos.

Special thanks to [http://palmweb.org/?q=node/2 Palmweb.org], Dr. John Dransfield, Dr. Bill Baker & team, for their volumes of information and photos.

Glossary of Palm Terms; Based on the glossary in Dransfield, J., N.W. Uhl, C.B. Asmussen-Lange, W.J. Baker, M.M. Harley & C.E. Lewis. 2008. Genera Palmarum - Evolution and Classification of the Palms. Royal Botanic Gardens, Kew. All images copyright of the artists and photographers (see images for credits).

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[[Category:DYPSIS|subacaulis]]