BY G. LEDYARD STEBBINS, JR.
University of California Publications in Botany vol. 19, No.7 pp. 245-266 13 fig. in text (1939)
Subgenus Onaepia Lynch,
Subgenus Montan Lynch
P. Delavayi Franch
P. Delavayi var. angustiloba Rehder and Wilson
P. suffruticosa Andr.
Subgenus Paeon, Lynch
P. albiflora Pall.
P. Emodi Wall.
P. anomala L.
Key to cultivated forms of P. anomala
A. Innermost sepal rounded or notched at the apex; petals 3.5.5 cm. long; disk well developed, 1-1.2 mm. high.
B. Plants strictly 1-flowered; innermost sepal emucronate or with a short mucro 0.5-2 mm. long; follicles usually glabrous or at least glabrate at maturity .... P. anomala (Siberian form)
B. Plants often 2-4-flowered; innermost sepal with a definite mucro 1.5.7 mm. long; follicles definitely tomentose at maturity ... P. anomala "Veitchii"
A. Innermost sepal more or less attenuate toward the well-developed mucro; petals 2-4 mm. long; disk relatively little developed, 0.8 mm. high or less.
C. Outermost sepal 6-7.5 mm. long; petals 3.5 - 4 mm. long, somewhat notched at the apex, cream color to pale pink; stigma cream color; plant flowering late (late May or early June in central New York) ......................P. anomala "Beresowskii"
C. Outermost sepal 3.5-5 mm. long; petals 2-2.8 mm. long, entire at the apex, deep rose color; stigmas pink; plant flowering early (early to mid-May in central New York) ...... P. anomala "Woodwardii"
P. tenuifolia L., P. hybrida Pall., and their relatives
P. Smouthi Van Houtte,
P. tenuifolia x triternata. x Paeonia Saundersii hybr. nov.
Key to P. anomala, P. tenuifolia, and related forms:
A. Innermost sepal mucronate, or at least with a strongly developed midrib which continues to its apex (figs. 5, a; 6, a) ; follicles glabrous or ahort-pubeacent; stem often 2-4-flowered.
B. Leaves scabrous-pubescent on thy midrib and often on the veins above, impressed veined, smooth and shining beneath, the lobes of the leaflets lanceolate or elliptic; petals 2.5.4.5 cm, long; plants with ferthe pollen and always producing seed. . ..... P. anomala
B. Leaves glabrous throughout, not impressed veined, lobes of the leaflets lance-linear; petals 5-6 cm. long; plants with partly sterile pollen, rarely producing seed ........ P. Smouthi (P. albiflora x tenuifolia)
A. Innermost sepal rounded, its midrib indistinct and never extending to the apex; follicles always pubescent; flower always solitary.
C. Roots fusiform; leaves glabrous below; follicles 9-13 mm. high at anthesis; disk 0-1 mm. high.
D. Leaf lobes narrowly linear, 1-2 mm. broad, very numerous, dorsal edge of the erect stigma straight except at the slightly recurved apex; disk absent .................P. tenuifolia
D. Leaf lobes 2-5 mm. broad, less numerous; stigmas more or less recurved and scythe-shaped; disk 0.5-1 mm. high ...................... P. hybrida
C. Roots not fusiform; leaves generally pubescent below; follicles, including the stigma, 13-19 mm. high at anthesis; disk a continuous fleshy ring 1-1.7 mm. high.
E. Leaves strongly pubescent below, the pubescence in living specimens visible to the naked eye; innermost sepal 12-17 mm. broad; follicles at anthesis 13-14 mm. high; partly ferthe tetraploids with good pollen ................................... P. tenuifolia "hybrida"
E. Leaves minutely short-pubescent below, the pubescence visible only under a lens, and sometimes almost invisible in dried specimens; innermost sepal 18-25 mm. broad; follicles at anthesis 14-19 mm. high; sterile hybrid ........ x P. Saundersii
Paeonia officinalis L.,
P. tomentosa Stapf
P. Broteri Boiss. et Reut.
P. triternata Pall.
P. cambessedesii, P. corsica, P. coriacea and P. Wittmanniana
P. coriacea Boiss
P. Wittmanniana Hartwiss (ex Lindl.)
P. obovata Maxim