Drosera tracyi

(Diels) Macfarlane in L. H. Bailey

in L. H. Bailey, Stand. Cycl. Hort. 2: 1077. 1914.

Common names: Tracy’s or Gulf Coast threadleaf sundew
Endemic
Basionym: Drosera filiformis var. tracyi Diels in H. G. A. Engler, Pflanzenr. 26[IV,112]: 92. 1906
Treatment appears in FNA Volume 6. Treatment on page 425. Mentioned on page 420, 421, 423.

Plants forming winter hibernaculae, rosettes 1 cm diam.; stem base bulbous-cormose, from expanded petiole base, 1–2 cm, woolly. Leaves erect; stipules adnate to petioles their entire length, 10 mm, margins fimbriate, forming woolly appearance of cormose base; petiole not differentiated from blade; blade filiform, 30–50 cm × 1–2 mm, glandular trichomes pale green, drying pale greenish brown. Inflorescences 4–12 (–24) -flowered; scapes 25–60 cm, glabrous. Pedicels glandular-pilose. Flowers 15–30 mm diam.; sepals connate basally, oblong to elliptic, 4–7 × 2–3 mm, glandular-pilose; petals rose, (rarely white), broadly ovate, 12–17 (–20) × 15 mm, apical margins erose. Capsules 5–6 mm. Seeds black, ellipsoid, abruptly caudate-truncate at both ends, 0.5–0.8 mm, coarsely crateriform, pits in 16–20 lines. 2n = 20.


Phenology: Flowering late May–Jun.
Habitat: Hillside seepage bogs and ecotones between pine savannas and bay-gum-cypress wetlands, wet roadside ditches and borrow pits, shores of sinkhole ponds
Elevation: 0–70 m

Distribution

V6 803-distribution-map.jpg

Ala., Fla., Ga., La., Miss.

Discussion

Drosera tracyi occurs on the Gulf Coastal Plain from southwestern Georgia to southeastern Louisiana. The species has been reported from South Carolina; no specimens from there have been seen. The leaves and flowers are larger than those of D. filiformis. An anthocyanin-free form with white flowers is known.

B. A. Sorrie (1998b) gave evidence from morphology and ecology that Drosera tracyi is distinct from D. filiformis. Drosera filiformis has been found growing with D. tracyi in Bay and Washington counties, Florida, without apparent hybrids (Sorrie). This seems to be a natural disjunction, but D. filiformis has been planted outside its range. An artificial hybrid, which is sterile, between these two species has resulted in a cultivar named ‘California Sunset.’

Many artificial hybrids have been made and given formal or informal cultivar names. The following sterile wild hybrids have been reported.

Drosera ×beleziana Camus (D. intermedia × D. rotundifolia): Nova Scotia, Michigan.

Drosera ×hybrida Macfarlane (D. filiformis × D. intermedia): New Jersey.

Drosera ×linglica Kusakabe ex Gauthier & Gervais (D. linearis × D. anglica): Quebec.

Drosera ×obovata Mertens & Koch (D. anglica × D. rotundifolia): British Columbia, southeastern Canada, Newfoundland, Quebec, Great Lakes region, northern California, Oregon, Washington, and New England.

Drosera ×woodii Gauthier & Gervais (D. linearis × D. rotundifolia): Quebec.

Drosera capillaris × D. intermedia, no hybrid name given: Pender County, North Carolina.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Drosera tracyi"
T. Lawrence Mellichamp +
(Diels) Macfarlane in L. H. Bailey +
Drosera filiformis var. tracyi +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
filiform +
circinate +  and infolded +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
overwintering +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Tracy’s or Gulf Coast threadleaf sundew +
multiflowered +
umbel-like +
Ala. +, Fla. +, Ga. +, La. +  and Miss. +
0–70 m +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
brown +, pale greenish +  and pale green +
Hillside seepage bogs and ecotones between pine savannas and bay-gum-cypress wetlands, wet roadside ditches and borrow pits, shores of sinkhole ponds +
multicelled +  and mucilage-tipped +
4-12(-24)-flowered +
petiolate +, estipulate +  and stipulate +
fimbriate +
glandular-pilose +
1.7 cm17 mm <br />0.017 m <br /> (2 cm20 mm <br />0.02 m <br />) +
distinct +
12mm;17mm +
15 cm150 mm <br />0.15 m <br /> (?) +
not differentiated +
Flowering late May–Jun. +
3-5-carpellate +  and compound +
in L. H. Bailey, Stand. Cycl. Hort. +
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +
20 +  and 70 +
crateriform +  and ellipsoid +
minute +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
glandular-pilose +
oblong +  and elliptic +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
bulbous-cormose +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0 cm0 mm <br />0 m <br /> (8 cm80 mm <br />0.08 m <br />) +
capitate +  and plumose +
10 cm100 mm <br />0.1 m <br /> (?) +
greener in shade +
cuneate +, obovate +, spatulate +, orbiculate +, suborbiculate +  and unlobed +
Drosera tracyi +
species +
jawlike +
rose +  and pinkish lavender +
deciduous +, perennial +  and annual +