Impatiens purroi Eb. Fisch., Wohlhauser & Rahelivololona, 2003

Fischer, Eberhard, Wohlhauser, Sebastien & Rahelivololona, Marie Elisette, 2003, New taxa of Impatiens (Balsaminaceae) from Madagascar. II. A collection from Masoala Peninsula, Adansonia (3) 25 (1), pp. 17-31 : 18-19

IMPATIENS subg. IMPATIENS

Impatiens purroi Eb. Fisch., Wohlhauser & Rahelivololona , sp. nov.

Ab omnibus speciebus madagascariensibus differt calcari gibboso apice obtuso.

TYPUS. — Purro & Wohlhauser 1003, Madagascar, Antsiranana, Masoala Peninsula Réserve Intégrale, 500 m above camp 1, 15°24’95’’S, 49°56’84’’E, 21 Sep. 1996 (holo-, NEU; iso-, TAN).

Erect herb. Stems lignous at base, up to 25- 30 cm tall, pubescent. Leaves ovate, acuminate, margin crenate-dentate with fimbriae in the sinus between two teeth, petiole 25-30 mm long, lamina 80-115 × 30-48 mm, lower surface pale-green with distinct reticulate veination. Flowers pale pink to purple with greenish veination. Pedicels 18-25 mm long. Lateral sepals 2, 4 × 1.2 mm. Lower sepal 11 × 5 mm, hairy outside, with gibbose, obtuse and ± straight spur of 7 mm of length. Dorsal petal helmet-like, 9 × 4 mm, with small apicule, hairy on crest. Lateral united petals 16 mm long, upper petal 10 × 4 mm, lower petal 12 × 8 mm. Anthers 3-4 mm long. Ovary 3 mm long. Fruit unknown. — Fig. 1.

HABITAT. — Epiphyte in dense evergreen forest, 720 m.

DISTRIBUTION. — Madagascar, only known from the type collection .

Impatiens purroi does not show close affinities to any known Madagascan Impatiens . The gibbose, ± straight and obtuse spur seems to be a unique feature.

Impatiens mindiae Eb. Fisch., Wohlhauser & Rahelivololona , sp. nov.

Impatienti manaharensi et I. tsaratanensi affinis, sed floribus majoribus, calcari curvato longiore et petalis lateralibus latioribus roseo-violaceis differt.

TYPUS. — Purro & Wohlhauser 1004, Madagascar, Antsiranana, Masoala Peninsula Réserve Intégrale, 15°25’31’’S, 49°57’00’’E, 21 Sep. 1996 (holo-, NEU; iso-, TAN).

Erect herb. Stems up to 45 cm tall. Leaves ovate, acuminate, petiole 7-13 mm long, lamina 55-70 × 23-27 mm, margin with 6-8 pairs of teeth and filiform fimbriae. Flowers with rose lateral united petals, two yellow spots in the centre, upper dorsal petal white with red dots. Pedicels 50-55 mm long. Lateral sepals 2, 6-7 × 2 mm. Lower sepal navicular, 16 × 5-6 mm, with 5 mm long spur-like apicule at lower base of mouth, spur up to 10 mm long, curved. Dorsal petal hood-like, 15 × 11 mm, with 5 mm long spur at apex. Lateral united petals 25 mm long, upper petal 8-10 × 4-5 mm, lower petal bilobed, 16- 17 × 15 mm. Anthers 4-5 mm long. Ovary 4 mm long. Fruit unknown. — Fig. 2.

HABITAT. — Montane bamboo evergreen forest, 1073 m.

DISTRIBUTION. — Madagascar, only known from the type collection.

Impatiens mindiae is related to I. manaharensis Baill. and I. tsaratanensis H. Perrier, but differs in the longer curved spur and the broader, rose

C

Figures

Fig. 1. — Impatiens purroi Eb. Fisch., Wohlhauser & Rahelivololona: A, habit; B, flower; C, lower sepal and spur; D, lateral united petals. (Purro & Wohlhauser 1003, NEU).

Fig. 2. — Impatiens mindiae Eb. Fisch., Wohlhauser & Rahelivololona: A, habit; B, flower, anterior view; C, flower, lateral view; D, lateral sepal; E, dorsal petal; F, lateral united petals; G, lower sepal and spur. (Purro & Wohlhauser 1004, NEU).