Cuscuta suksdorfii |
Cuscuta cuspidata |
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mountain dodder |
cusp dodder |
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Stems | yellow, slender. |
pale yellow, medium. |
Inflorescences | loose, umbelliform; bracts at base of clusters 1, at base of pedicels and/or flowers 0 or 1, ovate-lanceolate, membranous, margins entire, apex acute. |
loose, paniculiform; bracts at bases of clusters and pedicels, and on pedicels, 2–4, ovate-orbiculate to ovate-triangular, membranous, margins ± irregularly serrulate, apex obtuse or acute to bluntly cuspidate. |
Pedicels | 0–2 mm. |
2–5 mm. |
Flowers | 4- or 5-merous, 2.8–3.3 mm, membranous, not papillate; calyx slightly zygomorphic, creamy yellow, broadly campanulate, 1-1/3–1-1/2 corolla tube length, divided 1/2–3/5 its length, not reticulate or shiny, lobes ovate, bases not overlapping, margins entire, midvein not carinate, apex long-attenuate; corolla white, drying creamy yellow, 2.6–3 mm, tube campanulate, 1.2–1.5 mm, not saccate, lobes suberect, triangular-ovate, longer than corolla tube length, margins entire, apex lance-attenuate, straight; infrastaminal scales relatively poorly developed, oblong, 0.6–1 mm, 1/2–3/4 corolla tube length, bridged at 0.2–0.3 mm, usually reduced to denticulate wings, rarely 2-fid with 1–3 fimbriae on each side of filament attachments, 0.1–0.2 mm; stamens included or barely visible through corolla sinuses, shorter than corolla lobes; filaments 0.2–0.5 mm; anthers 0.2–0.4 × 0.2–0.3 mm; styles terete to slightly subulate, 0.3–0.7 mm, 1/4 ovary length. |
5-merous, 3.5–4.2 mm, membranous, not papillate; calyx creamy yellow, campanulate, 1/2 corolla tube length, divided to base or nearly so, finely reticulate, shiny, lobes ovate, bases overlapping, margins finely serrulate, midvein not carinate, apex acute to cuspidate; corolla white, drying creamy white, 3.3–4 mm, tube cylindric-campanulate, 2.2–3 mm, not saccate, lobes reflexed, ovate-oblong to ovate-triangular, 1/3–1/2 corolla tube length, margins entire, apex cuspidate-acute to obtuse, straight; infrastaminal scales oblong, rounded, 2–2.7 mm, 3/4–4/5 corolla tube length, bridged at 1–1.4 mm, ± uniformly densely fimbriate, fimbriae 0.3–0.6 mm; stamens exserted, slightly shorter than corolla lobes; filaments 0.6–0.9 mm; anthers 0.6–0.8 × 0.4–0.5 mm; styles filiform, 2–2.6 mm, longer than ovary. |
Capsules | ellipsoid-ovoid, ovoid-conic, or globose to depressed-globose, 2–3.2 × 2–3.6 mm, not thickened or raised around relatively small interstylar aperture, translucent, proximal 1/2 surrounded by withered corolla, indehiscent. |
globose to depressed-globose, 2.5–3 × 2.8–3.2 mm, with thickened and raised ridge or collar around relatively small interstylar aperture, translucent, capped by withered corolla, indehiscent. |
Seeds | 2–4, obcompressed, subglobose, 0.8–1.1 × 0.8–1 mm, hilum subterminal. |
2–4, angled, subglobose to broadly ellipsoid, 1.1–1.4 × 1–1.1 mm, hilum region ± terminal. |
2n | = 30. |
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Cuscuta suksdorfii |
Cuscuta cuspidata |
|
Phenology | Flowering Jul–Sep. | Flowering Jun–Oct. |
Habitat | mountain meadows. | prairies, sandy places, sometimes ruderal. |
Elevation | 1500–2600 m. (4900–8500 ft.) | 50–1500 m. (200–4900 ft.) |
Distribution |
CA; OR; WA
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AR; CO; IA; IL; IN; KS; KY; LA; MO; MS; ND; NE; NM; OK; SD; TX; UT
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Discussion | Reports of Cuscuta cuspidata from Connecticut and Wisconsin have not been verified. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 14. | FNA vol. 14. |
Parent taxa | Convolvulaceae > Cuscuta > subg. Grammica | Convolvulaceae > Cuscuta > subg. Grammica |
Sibling taxa | ||
Synonyms | C. salina var. acuminata, C. suksdorfii var. subpedicellata | |
Name authority | Yuncker: Mem. Torrey Bot. Club 18: 167. (1932) | Engelmann: Boston J. Nat. Hist. 5: 224. (1845) |
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