Key to Convolvulaceae

View taxon page for Convolvulaceae

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Plants non-green, parasitic, without leaves ..... CUSCUTA

1' Plants green, photosynthetic, with leaves

2. Styles 2, free or united only at base

3. Ovary not lobed; 

leaf 

Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets).

 

elliptic 

In the shape of a flattened circle or ellipse; wider than linear

; plant tufted ..... CRESSA

3' Ovary shallowly to deeply 2-lobed; leaf 

reniform 

Kidney-shaped; often pertaining to a leaf in which the blade base on both sides of the petiole is rounded and concave.

; plant matted ..... DICHONDRA

2' Style 1

4. Stigma unlobed, head-like ..... [IPOMOEA]

4' Stigma 

lobes 

1. A major expansion or bulge, such as on the margin of a leaf, sepal, or petal, or on the surface of an ovary. 2. The free tips of otherwise fused structures, such as sepals or petals; larger than teeth.

2, 

oblong 

Longer than wide, with nearly parallel sides; wider than linear.

to 

linear 

Elongate, with nearly parallel sides; narrower than elliptic or oblong.

5. Stigma lobes oblong, tips 

obtuse 

Having a short-tapered, blunt tip or base, the sides convex or straight and converging at more than a right angle.

; calyx 7–25 mm; corolla 20–75 mm ..... CALYSTEGIA

5' Stigma lobes linear to narrowly spoon-shaped, tips 

acute 

Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle.

; calyx 3–10 mm; corolla <= 40 mm ..... CONVOLVULUS

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