Drosera sessilifolia

Drosera sessilifolia нь жижигхэн Өмнөд Америкийн нарс мод юм. Энэ нь улаан- шар өнгийн цэцэгтэй, улаан өнгийн навчтай. Энэ нь нэг л борооны улиралд амьдардаг нэг жилийн ургамал юм.

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.

Төрөлх бүс нутаг: Бразил, Венесуэл, Гайана

Уур амьсгалын бүсүүд: Тропик, хуурай болон хуурай улиралтай

D. sessilifolia grows in sandy or gravelly soils in seasonal seepages, where a thin film of water covers the sand during the rainy season; at the edges of these seepages it also grows in drier sandy or gravelly soil. It has been recorded from about 150 m altitude in the Pantanal floodplain up to about 1,200 m at Chapada dos Veadeiros. In Brazil it is known from many states, from Minas Gerais and Goiás to the northeast coast, where it grows near the freshwater pools that form among sand dunes in the wet season. It lives where the wet and dry seasons are very distinct.

Насанд хүрсэн хэмжээ: Розет нь ихэвчлэн 1-2см өргөнтэй (4.5см хүртэл); цэцгийн мөчир нь ихэвчлэн 5-8см өргөнтэй

Өсөлтийн хурд: Хурдан

Хавхын төрөл: Flypaper Trap

Like other sundews, the leaves carry stalked glands whose sticky drops of mucilage attract and hold small insects. The glands then secrete enzymes that digest the prey, and the leaf absorbs the nutrients.

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.

Францын ургамал судлаач Август де Сент- Хилер Бразилын Минас Жерайс мужийн Сан Франциско голын ойролцоо Drosera sessilifolia ургамлыг олж, 1824 онд тодорхойлсон. Жорж Бентам Гайанаас Drosera dentata ургамлыг 1842 онд тодорхойлсон, Людвиг Диэлс 1906 онд Droseraceae монографид D. sessilifolia- ийн нэрийг хассан. Бразилийн ургамал судлаач Фернандо Ривадавия 1996 онд ургамлыг олон аяллын дараа л олсон, учир нь ургамал хуурай улиралд үхсэн байсан.

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