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    台灣植物誌 第二版  Flora of Taiwan, 2nd edition    Vol. 3

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    台灣植物誌第二版  Flora of Taiwan, 2nd edition  3: 616

     73. BALSAMINACEAE 鳳仙花科
    HUANG, TSENG-CHIENG

    Juicy herbs. Leaves usually alternate, simple, estipulate. Flowers zygomorphic, bisexual, solitary or racemose; sepals 3(-5), imbricate, unequal, the lowest spurred; stamens 5, the filaments connate at tip; ovary superior, 5-locular; stigmas 1-5; ovules numerous. Fruit a capsule; seeds without endosperm, the embryo straight.
    Two genera, with about 4,000 species, chiefly in tropical Asia and Africa, a few in temperate regions; one in Taiwan.

    1. IMPATIENS L. 鳳仙花屬

    Erect, glabrous herbs. Leaves alternate, lanceolate-elliptic or elliptic, the apex acuminate, the base cuneate-obtuse or attenuate, the margins serrate or crenate, glabrous or hairy, petiolate; stipules absent. Flowers zygomorphic, bisexual, terminal or axillary, solitary or racemous, yellow, pale purple, reddishpurple or white; sepals 3, the 2 lateral ones small, the lip saccate, the sac with a linear, straight or recurved spur; petals 3, the standard often apiculate, the lateral wings often 2-3-lobed; stamens 5, monadelphous; ovary linear, with a short style. Capsules loculicidally dehiscent.
    About 400 species in the temperate and tropical parts of the world, three species in Taiwan.

    LITERATURE

    Huang, T. C. 1973. A revision of Formosan Impatiens (Balsaminaceae). In Taiwania 18(1): 49-54.

    KEY TO SPECIES
    1. Flowers (3-)6, in racemes; pedicellate bracts usually one; spur simple; bristles on the upper side of crenatures; wing-petals bilobed, the short lobe wide… 1. I. devolii
    1. Flowers 1(-2), pedicellate bracts usually two; spur usually biforked; bristles on toothed-apex or emarginate-apex; wing-petals bilobed or trilobed, the short lobe narrower.
    2. Leaves glabrous; wing-petals bilobed; staminate column flat inside; anthers obtuse; flowers yellow… 2. I. tayemonii
    2. Leaves hispid; wing-petals 3-lobed: staminate column prominently thick-ringed inside; anthers caudate; flowers reddish-purple, pale purple or white… 3. I. uniflora

    1. Impatiens devolii Huang in Taiwania 18(1): 49. pl. 1.1973; Huang in Fl. Taiwan 3: 599, pl. 744. 1977. 棣慕華鳳仙花 Pl.316, Photo 44
    An erect herb, 30-60 cm tall, few-branched; stems terete. Leaves petiolate, the petioles 1-3.5 cm long, the blades elliptic or lanceolate-elliptic, 5-14 cm long, 2-5 cm wide, the apex caudate-acuminate, the base cuneate, the margins crenate and with bristles on the upper side of the sinuses of the convex teeth (crenatures). Racemes terminal or axillary, 3-6-flowered; peduncles 3-8 cm long; pedicels 1-5 cm long, 1-bracteate; bracts 4 mm long; calyx of 3 sepals, the 2 lateral ones elliptic, 5.5 mm long, the lip saccate, the sac with a linear undivided straight or recurved spur, 2.2 cm long; corolla yellow, of 3 petals, the standard obovate, 6.5 mm long, the apex obtuse, apiculate, the 2 lateral wings semi-oblong, 9-17 mm long, unequally bilobed; stamens 5, monadelphous, 4-5.5 mm long, the anther-apices obtuse, the filaments fused at the upper part; ovary linear, 5 mm long, with unbranched style. Capsules loculicidally dehiscent, 2-2.5 cm long; seeds oblong, granulate, about 3 mm long.
    Endemic, growing under forest shade at altitudes of 2,000-2,100 m.