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flat-globe dodder

globe dodder

Stems

orange-yellow, slender.

Inflorescences

dense, corymbiform to glomerulate;

bracts at base of clusters 1, at base of pedicels 0 or 1, ovate, membranous, margins entire, apex acute.

Pedicels

0.4–1.3 mm.

Flowers

5-merous, 2–2.6 mm, membranous, not papillate;

calyx straw yellow, cupulate, equaling corolla tube length, divided 2/3 its length, finely reticulate, shiny, lobes ovate, bases not overlapping, margins entire, midvein with multicellular protuberances, apex acute;

corolla white, drying creamy, 1.5–2.1 mm, tube cylindro-campanulate, becoming globose, 0.8–1.2 mm, not saccate, lobes erect to spreading, ovate-triangular, shorter than to equaling corolla tube length, margins usually entire, sometimes irregularly toothed, apex acute, straight to slightly incurved;

infrastaminal scales oblong or rounded, 0.9–1.3 mm, equaling or slightly longer than corolla tube length, bridged at 0.1–0.2 mm, uniformly fimbriate in distal 1/2, fimbriae 0.1–0.3 mm;

stamens exserted, shorter than corolla lobes;

filaments 0.3–0.6 mm;

anthers 0.2–0.3 × 0.2–0.3 mm;

styles filiform, 0.4–0.7 mm, shorter than to equaling ovary.

Capsules

depressed-globose, 1.5–2.5 × 1–1.8 mm, not thickened or raised around relatively small interstylar aperture, translucent, loosely surrounded or capped by withered corolla, dehiscence circumscissile.

Seeds

3 or 4, angled, broadly ellipsoid to subglobose, 0.8–1 × 0.7–0.9 mm, hilum region almost terminal.

Cuscuta umbellata

Cuscuta azteca

Phenology Flowering Jul–Nov.
Habitat Hosts: Asteraceae, Euphorbiaceae, Fabaceae (especially Dalea), Malvaceae.
Elevation 600–1800 m. (2000–5900 ft.)
Distribution
from USDA
United States; Mexico; South America; West Indies
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM; Mexico
Discussion

Varieties 2 (1 in the flora).

Variety desertorum Engelmann is known from South America (Brazil).

(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
C. americana, C. approximata, C. azteca, C. boldinghii, C. brachycalyx, C. californica, C. campestris, C. cephalanthi, C. chinensis, C. compacta, C. coryli, C. cuspidata, C. dentatasquamata, C. denticulata, C. draconella, C. epilinum, C. epithymum, C. erosa, C. europaea, C. exaltata, C. glabrior, C. glomerata, C. gronovii, C. harperi, C. howelliana, C. indecora, C. japonica, C. jepsonii, C. legitima, C. leptantha, C. liliputana, C. mitriformis, C. nevadensis, C. obtusiflora, C. occidentalis, C. odontolepis, C. pacifica, C. pentagona, C. plattensis, C. polygonorum, C. rostrata, C. runyonii, C. salina, C. squamata, C. suaveolens, C. subinclusa, C. suksdorfii, C. tuberculata, C. umbrosa, C. warneri
C. americana, C. approximata, C. boldinghii, C. brachycalyx, C. californica, C. campestris, C. cephalanthi, C. chinensis, C. compacta, C. coryli, C. cuspidata, C. dentatasquamata, C. denticulata, C. draconella, C. epilinum, C. epithymum, C. erosa, C. europaea, C. exaltata, C. glabrior, C. glomerata, C. gronovii, C. harperi, C. howelliana, C. indecora, C. japonica, C. jepsonii, C. legitima, C. leptantha, C. liliputana, C. mitriformis, C. nevadensis, C. obtusiflora, C. occidentalis, C. odontolepis, C. pacifica, C. pentagona, C. plattensis, C. polygonorum, C. rostrata, C. runyonii, C. salina, C. squamata, C. suaveolens, C. subinclusa, C. suksdorfii, C. tuberculata, C. umbellata, C. umbrosa, C. warneri
Subordinate taxa
C. umbellata var. umbellata
Synonyms C. potosina var. globifera
Name authority Kunth in A. von Humboldt et al.: Nov. Gen. Sp. 3(fol.): 95; 3(qto.): 121. (1819) Costea & Stefanović: Organisms Diversity Evol. 11: 381, figs. 1h, 2g, 4. (2011)
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