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| Photo
by Renee Brecht |
Britton and Brown. See
credits below.** |
| Botanical name: |
Drosera filiformis Raf. |
| Common
name: |
thread-leaved sundew |
| Synonomy: |
Drosera filiformis Raf. var. filiformis
Drosera tenuifolia Muhlenberg |
| Group: |
Dicot |
| Family: |
Droseraceae |
| Growth
Type: |
Forb/herb |
| Duration: |
Perennial |
| Origin: |
Native |
| Plant
height: |
3 to 10" |
| Foliage: |
forms a "fiddlehead" as it unfurls; rosette forming, leaves are long, erect, filiform |
| Flower
color: |
pale pink |
| Flower
size: |
3/8" - 1/2" across; 5 petals |
| Flowering/fruiting time |
late June to late August |
| Habitat: |
bogs and wet sands throughout the Pine Barrenss |
| Range
in
New Jersey: |
Pine barrens; rarely in outlying pine barren islands in West Jersey and on the coast |
| Heritage ranking if any: |
n/a |
| Distribution: |
 |
| Misc.: |
Drosera, from the Greek, droseros (droseros), "dewy, watery"; filiformis, from the Latin, "thread-like";
Sundews
trap insects on the sticky, muciligenic hairs then digest them. New
Jersey has three species of sundews: spatulate leaved (intermedia),
round leaved (rotundifolia) and thread leaved (filiformis).
Witmer
Stone, in 1910, wrote: "This is a far handsomer species than either of
the preceding (D. rotundifolia, D. intermedia) and from the nature of
its growth far more conspicuous. The large crimson-pink flowers are
open only during part of the morning on sunshiny days, closing up at
other times like the Portulaca of our gardens. The plants prefer open
damp sand, where they are not shaded or crowded by other vegetation.
Sometimes they grow very abundantly in such spots, and I have seen
their erect filiform leaves in rank upon rank, the glutinous secretion
on the glands glistening in the sunlight and making the whole patch
look like dew covere spider webs, such as we frequently see on an early
autumn morning. When examined closely the leaves will always be found
to have small flies, mosquitoes and other insects attached tho their
thread-like glands" (469).
Blooms earlier than Drosera rotundifolia and D. intermedia.
Mary
Treat of Vineland researched Droseraceae and corresponded with Charles
Darwin regarding her research. For more information on this
correspondence, visit NJ Pines.
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Sources
**USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 1: 519. |
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