| 1 |
Inflorescences terminal, narrowly cylindric thyrses, sharply differentiated from vegetative shoots, cymes subtended by very reduced bracts.
|
(2)
|
| 1 + |
Inflorescences axillary or subterminal, mostly cymes, sometimes compact thyrses or reduced to a solitary flower, all except sometimes the uppermost subtended by normal leaves.
|
(3)
|
| 2 (1) |
Thyrses lax; lateral cymes to 5-flowered; calyx clearly 2-lipped; corolla white
(12)
|
Caryopteris siccanea
|
| 2 (1) + |
Thyrses very dense; lateral cymes more than 5-flowered; calyx deeply 6-lobed; corolla bluish purple
(13)
|
Caryopteris bicolor
|
| 3 (1) |
Inflorescences dense axillary thyrses; fruit globose, ca. 4 as long as calyx
(14)
|
Caryopteris paniculata
|
| 3 (1) + |
Inflorescences axillary or subterminal cymes, often corymbose, sometimes reduced to 1 flower; fruit usually winged or lobed, to 2 as long as calyx.
|
(4)
|
| 4 (3) |
Leaf blade entire or with occasional teeth.
|
(5)
|
| 4 (3) + |
Leaf blade regularly crenate or serrate.
|
(8)
|
| 5 (4) |
Leaf blade linear-lanceolate or linear-oblong to narrowly oblanceolate, abaxial veins often darker than rest of leaf surface.
|
(6)
|
| 5 (4) + |
Leaf blade elliptic to subrounded, abaxial veins same color or paler than rest of leaf surface.
|
(7)
|
| 6 (5) |
Leaf blade adaxially puberulent; corolla 10-15 mm; ovary glabrous
(1)
|
Caryopteris mongholica
|
| 6 (5) + |
Leaf blade adaxially glutinous and shiny; corolla 6-8 mm; ovary hairy
(2)
|
Caryopteris glutinosa
|
| 7 (5) |
Leaf blade elliptic to narrowly ovate; corolla whitish to yellow, rarely pale blue
(3)
|
Caryopteris forrestii
|
| 7 (5) + |
Leaf blade ovate to subrounded; corolla purplish
(4)
|
Caryopteris jinshajiangensis
|
| 8 (4) |
Cymes dense, corymbose, without bracts and bractlets; abaxial corolla lobe fringed to dentate; nutlets winged, glabrous or with subapical tuft of stiff coarse hairs.
|
(9)
|
| 8 (4) + |
Cymes lax, rarely clearly corymbose, with bracts and bractlets; abaxial corolla lobe entire; nutlets not winged, uniformly puberulent.
|
(11)
|
| 9 (8) |
Corolla glabrous except for a patch of long lanate hairs on each lobe
(7)
|
Caryopteris trichosphaera
|
| 9 (8) + |
Corolla uniformly appressed puberulent.
|
(10)
|
| 10 (9) |
Leaf blade same color on both surfaces; nutlets with subapical patch of stiff coarse hairs
(5)
|
Caryopteris incana
|
| 10 (9) + |
Leaf blade distinctly white abaxially; nutlets glabrous
(6)
|
Caryopteris tangutica
|
| 11 (8) |
Cymes more than 5-flowered, branches divaricate; calyx shallowly bowl-shaped, exposing nutlets
(11)
|
Caryopteris divaricata
|
| 11 (8) + |
Cymes 1-5-flowered, branches not divaricate; calyx campanulate, enclosing nutlets.
|
(12)
|
| 12 (11) |
Leaf blade irregularly sharply serrate with 1-3 teeth per side, those subtending cymes subentire; ovary and nutlets with yellow hairs
(10)
|
Caryopteris aureoglandulosa
|
| 12 (11) + |
Leaf blade, including those subtending cymes, regularly serrate to crenate with 4-10 teeth or lobes per side; ovary and nutlets with white hairs.
|
(13)
|
| 13 (12) |
Leaf blade crenate with 4-6 rounded lobes per side; flowers always solitary
(8)
|
Caryopteris nepetifolia
|
| 13 (12) + |
Leaf blade serrate with 6-10 sharp teeth per side; flowers mostly in (2- or) 3-5-flowered cymes, rarely solitary
(9)
|
Caryopteris terniflora
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