Key to Rutaceae

View taxon page for Rutaceae

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

1. Leaf 

simple 

Composed of a single part; undivided; unbranched.

or 0

2. Leaves 

opposite 

1. Arranged in pairs along an axis - e.g., two leaves per node. 2. Occurring in the same rank, directly above or below, as 'stamens opposite petals'. 3. Located directly across from.

; ovary chamber 1; fruit drupe-like ..... CNEORIDIUM

2' Leaves 

alternate 

1. Arranged singly, often spirally, along an axis - e.g., one leaf per node. 2. Occurring in different ranks, appearing to be between, not directly above or below, as 'stamens alternate petals'.

; ovary chambers 2; fruit a capsule ..... THAMNOSMA

1' Leaf deeply dissected or compound

3. Shrub or small tree; petals ± green-white, 

entire 

Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.).

; fruit a round, ± flat, wing-encircled 

achene 

Dry, indehiscent, 1-seeded fruit from a 1-chambered ovary, sometimes winged, often appearing to be a naked seed. A 1-seeded dry fruit derived from an inferior ovary of > 1 carpel (e.g., Asteraceae, Dipsacaceae) is sometimes called a cypsela.

..... PTELEA

3' Perennial herb, subshrub; petals yellow, wavy to 

fringed 

Having ragged or finely cut margins.

; fruit a capsule ..... RUTA

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