Cuscuta cephalanthi |
Cuscuta tuberculata |
|
---|---|---|
butterbush dodder, button-bush dodder |
tuber dodder, tubercle dodder |
|
Stems | yellow-orange, medium. |
yellow-orange, filiform. |
Inflorescences | dense to loose, spiciform or paniculiform, commonly originating endogenously; bracts at base of clusters 1 or 2, at base of pedicels and/or flowers 0 or 1, ovate, membranous, margins entire or serrulate, apex obtuse to acute. |
loose, umbelliform-racemiform; bracts at base of clusters 1, at base of peduncles 0(or 1), ovate-lanceolate, membranous, margins entire, apex acute. |
Pedicels | 0–1 mm. |
2–3(–5) mm. |
Flowers | (3 or)4(or 5)-merous, 2–3 mm, membranous, not papillate; calyx yellow-brown, shallowly cupulate, 1/2 corolla tube length, divided 2/3 its length, not reticulate, not shiny, lobes oblong-ovate, bases slightly overlapping, margins entire or serrulate, midvein not carinate, apex obtuse; corolla white, drying creamy white, 1.8–2.8 mm, tube cylindric-campanulate to cylindric, 1.1–2.2 mm, not saccate, lobes spreading, ovate, 1/3–1/2 corolla tube length, margins entire, apex obtuse, straight; infrastaminal scales oblong, rounded, 0.9–1.7 mm, shorter than to equaling corolla tube length, bridged at 0.2–0.4 mm, sparsely fimbriate, more densely distally, fimbriae 0.1–0.3 mm; stamens included to slightly exserted, equaling corolla lobes; filaments 0.2–0.4 mm; anthers 0.2–0.4 × 0.2–0.4 mm; styles filiform or narrowly terete, (0.6–)1–2 mm, equaling or longer than ovary. |
5-merous, 2.5–4 mm, membranous, papillate, especially at base of corolla tube; calyx yellow, cupulate-angular, 1/3–1/2 corolla tube length, divided ± to base, not or finely reticulate, ± glossy, lobes triangular to lanceolate, bases not overlapping, margins entire, midvein carinate and/or with multicellular protuberances, apex acute to acuminate; corolla white, drying creamy yellow, 2–3.5 mm, tube cylindric, 1.5–2.2 mm, not saccate, lobes erect, triangular-lanceolate, equaling corolla tube length, margins entire, apex acute, straight; infrastaminal scales ovate to oblong, 0.8–1.1 mm, 1/3–1/2 corolla tube length, bridged at 0.5–0.7 mm, rounded, uniformly short-fimbriate, fimbriae 0.2–0.3 mm; stamens barely exserted, shorter than to equaling corolla lobes; filaments 0.4–0.7 mm; anthers 0.5–0.8 × 0.3–0.5 mm; styles filiform, 1.5–3 mm, longer than ovary. |
Capsules | depressed-globose to globose, 2.5–3.2(–4) × 2–4 mm, not thickened or raised around relatively small interstylar aperture, not translucent, capped by withered corolla, indehiscent. |
globose, 1.3–2.2 × 1–2.3 mm, slightly thickened and raised around relatively small interstylar aperture, translucent, capped by withered corolla, dehiscence circumscissile. |
Seeds | 1 or 2, obcompressed, broadly ovoid, 1.4–2 × 1.3–1.4 mm, hilum region terminal. |
2–4, angled or slightly obcompressed, ellipsoid-oblong, 0.6–0.9 × 0.3–0.5 mm, hilum area lateral. |
2n | = 60. |
|
Cuscuta cephalanthi |
Cuscuta tuberculata |
|
Phenology | Flowering Jun–Oct. | Flowering Aug–Nov. |
Habitat | stream and lake shores, marshes, and floodplain forests. | desert and thornscrub. |
Elevation | 0–1500 m. (0–4900 ft.) | 500–1000 m. (1600–3300 ft.) |
Distribution |
AR; AZ; CA; CT; DC; GA; IA; ID; IL; IN; KS; KY; MA; ME; MI; MN; NC; ND; NE; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; WA; WI; AB; BC; MB; NB; NS; ON
|
AZ; NM; Mexico (Baja California, Baja California Sur, Sonora)
|
Source | FNA vol. 14. | FNA vol. 14. |
Parent taxa | Convolvulaceae > Cuscuta > subg. Grammica | Convolvulaceae > Cuscuta > subg. Grammica |
Sibling taxa | ||
Name authority | Engelmann: Amer. J. Sci. Arts 43: 336, plate 6, figs. 1–6. (1842) | Brandegee: Univ. Calif. Publ. Bot. 3: 389. (1909) |
Web links |
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