Drosera sessilifolia

Drosera Is e sessilifolia plannt beag sundew Ameireaganach a Deas le ròis de dhuilleagan cruinn, buailteach do dhuilleagan geal is flùraichean pinc-lilac. San fharsaingeachd, ’s e plannt bliadhnail a th’ ann a bhios beò airson aon ràithe bhàn.

Drosera sessilifolia forms a rosette of small, wedge-shaped to round carnivorous leaves. The leaves are usually yellowish and become redder with age. Plants are usually 1 to 2 cm across, and the largest wild rosettes recorded measured 4.5 cm.

The tiny flowers have pink-lilac or light lilac petals, and the sepals are often covered with short, stiff red hairs. The flower stalks are usually 5 to 8 cm tall and do not curve at the base, although one stalk 52 cm tall has been recorded.

It is very similar to its closest relative, Drosera burmannii, and the two make up section Thelocalyx. D. sessilifolia generally has rounder leaf blades and wider, shorter petioles, while D. burmannii has wedge-shaped, almost triangular leaves. Flower color does not separate them reliably, because some D. burmannii also have pink flowers. Both species have five styles that divide at the tip, unlike the other sundews of the Americas.

Roinn Dhùthchasach: An Bhrasaíl, Venesuela agus Guyana

Sònaichean Gnàth-shìde: Tropical, with distinct wet and dry seasons

Bidh D. sessilifolia a’ fàs ann an làr gainmhich no gairbheach ann an sgìrean a tha a’ sìor fhàs, far a bheil film tana de dh’uisge a’ còmhdach an ghainmhich fad na h-ùine bhàn; aig mullach nan sgìrean sin bidh e a’ fàs ann an làr gainmhich no gairbheach nas tiorma cuideachd. Tha e air a chlàradh bho timcheall air 150m air an àirde ann an sgìrean a tha a’ tuiteam fo uisge ann an Pantanal gu timcheall air 1,200m aig Chapada dos Veadeiros. Ann am Breatainn tha e air a bhith air a chlàradh ann an iomadh stàit, bho Minas Gerais agus Goiás gu ceann an iar-thuath na dùthcha, far a bheil e a’ fàs faisg air lochan uisge-beatha a tha a’ cruthachadh am measg dunan gainmhich anns an t-seusan fliuch. Tha e a’ fuireach far a bheil na seachdaidhean fliuch is tioram gu math eadar-dhealaichte.

Meud Inbheach: Tha an ròis 1-2 cm air fad (gu 4.5 cm) gu tric; tha na duilleach 5-8 cm gu tric

Ìre Fàis: Fast

Seòrsa Ribe: Ribe Pàipear-cuileag

Mar a tha aig na duilleagan ri lusan eile, tha glandaichean air na duilleagan a tha a’ tarraing agus a’ cumail marbhadh bheaga. An uair sin, bidh na glandaichean a’ sgaoileadh enzyms a dh’fhaodas an preas a dhì-bheathachadh, agus bidh na duilleagan a’ gabhail ris na beathachadh.

In the wild it grows, flowers, sets seed and dies within one rainy season; the seed sprouts with the next rains.
In seepages its seed germinates under a film of water and algae, so seedlings are often seen still submerged.
It and Drosera burmannii are the only two species in section Thelocalyx.
A hybrid with D. burmannii was made in cultivation in 1994 and called D. x thelocalyxiana.
Seed sold as D. sessilifolia before 2009 was sometimes D. burmannii or a hybrid.

Dh’aithnich an luibh-eòlaiche Fraingis Auguste de Saint-Hilaire Drosera sessilifolia ann an taobh an iar Minas Gerais, Braisil, faisg air abhainn São Francisco, agus rinn e cur-ris air ann an 1824. Dh’innis George Bentham mu Drosera dentata à Guyana ann an 1842, agus chuir Ludwig Diels e sìos gu ainm co-ionann ri D. sessilifolia anns a’ mhonografi aige air Droseraceae ann an 1906. Ann an 1996 rinn an luibh-eòlaiche Braisil Fernando Rivadavia cur-ris air a bhith a’ lorg e san fhiadh-bheatha ach às dèidh grunn thursan, oir bha na planntaichean air bàsachadh san t-seusan tioram.

1. Drosera sessilifolia, Wikipedia
2. Rivadavia, F. (1996). Drosera sessilifolia. Carnivorous Plant Newsletter 25(1): 26-29
3. Growing Drosera burmannii and D. sessilifolia, International Carnivorous Plant Society
4. Growing Subtropical Drosera, International Carnivorous Plant Society
5. Drosera, Wikipedia