232 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [ Vol^ 8, No. 3 



North Nyasa District: Nyika Plateau; Nchena-chena Spur, one plant beside a 

 grassland trail, pale pink herb, 1900 m., Aug. 20, 1946, 27356*. Portuguese East 

 Africa, Nyasaland, and N. Rhodesia. 



The material is too poor for certain identification. 



Impatiens shirensis Bak. f. Trans. Linn. Soc. Bot. II. 4: 7. 1894; Gilg, Bot. 

 Jahrb. 43: 111. 1909. 

 Mlanje District: Mlanje Mountain; Luchenya Plateau, frequent on banks of 

 streams in forest, shrub 1.5-2 m. high, more or less fleshy, branches numerous, 

 erect, flowers white or pinkish-white, 1820 m., June 25, 1946, 16423. Nyasaland 

 only. 



Impatiens zombensis Bak. Kew Bull. 1897: 247. 1897; Gilg, Bot. Jahrb. 43: 114. 

 1909; Engl. Pflanzenw. Afr. 3 a : 302. 1921. 



Zomba District: Zomba Plateau, common on moist shady banks of a stream, 

 herb 50-100 cm. high, flowers reddish-pink, 2.5 cm. in diameter, 1400 m., May 28, 

 1946, 16043. Mlanje District: Mlanje Mountain, west slopes, on moist banks of 

 streams, herb 15-40 cm. high, plant erect, fleshy, stems and branches red, flow- 

 ers mauve, 1700 m., June 24, 1946, 16408; ibid., Luchenya Plateau, plentiful on 

 open banks of streams in forest, often in dense clumps, herb 30-40 cm., stems 

 and branches red, flowers rose-pink, showy, 1820 m., July 1, 1946, 16584. 



Brass 16408 and 16584 are rather more glabrescent than /. zombensis but the 

 same as a specimen at Kew collected in 1891 by Whyte on Mount Mlanje. The 

 Mlanje plant may be varietally separable. 



Impatiens zombensis Bak. var. micrantha Brenan, var. nov. 



A typo differt foliis superne saepe subverticillatis plerumque pro rata angusti- 

 oribus superioribus 2-5 x 0.8-1.7 cm. inferioribus usque ad 10 x 3 cm., nervis 

 lateralibus foliorum utrinque 4-6 (in /. zombensi typica 6-8), floribus minoribus, 

 vexillo 3-4.5 mm. longo 3.5-5.5 mm. lato (nec 6-9 x 5-7 mm.), alis 8-11 mm. lon- 

 gis lobis angustioribus. 



Blantyre District: Blantyre; Shire Highlands, 1887, /. T. Last s.n. (Herb. 

 Kew.). Zomba District: Zomba Plateau, local on moist shady banks of a stream 

 in rain-forest, herb 20-40 cm. high, stems and branches red, flower mauve, about 

 half the size of the common plant of the area, 1500 m., June 7, 1946, 16321 

 (TYPUS varietatis). 



Later research may show that this is a distinct species. At present I do not 

 consider the characters important or constant enough to be more than varietal. 



Impatiens walleriana Hooko f. in Oliv. Fl. Trop. Afr. 1: 302. 1868; Gilg, Bot. 

 j*ahrb. 43: 118. 1909. 

 Cholo District: Cholo Mountain, open rocky bed of rain-forest gulley, herb 30 

 -50 cm. high, branched into a flat top, very fleshy, flowers dark carmine, 1200 

 m., Sept. 24, 1946, 17779; ibid., frequent in rain-forest gullies, herb about 50 cm. 

 high, branched into a flat top, flowers reddish-carmine, 1200 m., Sept. 26, 1946, 

 17828. E. Africa, from Kenya to Portuguese East Africa and Nyasaland. 



Impatiens sp. (sect. Microcentron Warb. § Stenocentron Warb.) 



North Nyasa District: Nyika Plateau, plentiful on borders of montane forest, 

 herb about 1 m. high, erect, branches and petioles red, petals mauve, sepals and 

 spur red, 2300 m., Aug. 13, 1946, 17204. 



I have not matched this exactly, and it may be new. I think that as it belongs 

 to a difficult and critical group it is better to await further material before de- 

 scribing it. 



