Cuscuta suksdorfii |
Cuscuta runyonii |
|
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mountain dodder |
Runyon's dodder |
|
Stems | yellow, slender. |
yellow-orange, slender to 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, umbelliform or corymbiform; bracts at base of clusters 1, at base of pedicels 0 or 1, ovate to lanceolate, membranous, margins entire, apex acute. |
Pedicels | 0–2 mm. |
0.8–4(–5) mm, sometimes papillate. |
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, 2.5–3.5(–4) mm, membranous, papillate on perianth, ovary, and capsule; calyx reddish brown, cupulate, shorter than or equaling corolla tube length, divided 1/2–2/3 its length, ± reticulate, shiny, lobes triangular, bases not overlapping, margins entire, midvein sometimes ± carinate, base of calyx corresponding to each lobe with reflexed spurlike projection 0.1–0.6 mm, apex obtuse to subacute; corolla white, drying reddish brown, 2.2–3.5 mm, tube campanulate-globose, 1.1–1.8 mm, saccate between lines of stamen attachments, lobes reflexed, triangular-ovate to lanceolate, equaling corolla tube length, margins entire, apex acute to acuminate, inflexed; infrastaminal scales obovate to spatulate, 1.1–2 mm, equaling corolla tube length, bridged at 0.2–0.4 mm, rounded, uniformly densely fimbriate, fimbriae 0.3–0.7 mm; stamens exserted, shorter than corolla lobes; filaments 0.4–0.6 mm; anthers 0.4–0.6 × 0.4–0.5 mm; styles filiform, 0.9–1.8 mm, equaling or 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. |
depressed-globose, 1.6–3 × 2–3.4 mm, not thickened or raised around relatively large interstylar aperture, not translucent, 1/2+ enveloped by withered corolla, indehiscent. |
Seeds | 2–4, obcompressed, subglobose, 0.8–1.1 × 0.8–1 mm, hilum subterminal. |
4, angled, ovoid to broadly ellipsoid, 0.9–1.4 × 0.8–1.1 mm, hilum region subterminal. |
Cuscuta suksdorfii |
Cuscuta runyonii |
|
Phenology | Flowering Jul–Sep. | Flowering Mar–Dec. |
Habitat | mountain meadows. | Hosts: Dalea, Dyschoriste, Erigeron, Gutierrezia, Hymenoxys, Justicia, Linum, Melampodium, Nama, Oenothera, Spermolepis, Tetraneuris, Thamnosma, Thelesperma, Tiquilia. |
Elevation | 1500–2600 m. (4900–8500 ft.) | 0–200 m. (0–700 ft.) |
Distribution |
CA; OR; WA
|
TX |
Discussion | Cuscuta runyonii is closely allied with C. glabrior (M. Costea et al. 2015); it differs in having a spurlike appendage at the base of each calyx lobe. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
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) | Yuncker: Bull. Torrey Bot. Club 69: 541, fig. 1. (1942) |
Web links |
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