umn which is of the Rhipidoglossum type. It possesses, 
however, a distinct tooth in the mouth of the spur and, 
moreover, the petals are markedly acute and similar in 
shape to those in other species of Diaphananthe. As I 
pointed out in my revision of Rhipidoglossum (Blumea 
Suppl. 1, 78-9: 1937) the two genera are very closely 
allied, but it still appears advantageous to maintain them 
as separate entities for the time being. 
Diaphananthe tenerrima (Kraenzlin) Summer- 
hayes comb. nov. 
Listrostachys tenerrima Kraenzlin in Vierteljahrsschr. 
Nat. Ges. Ziirich 68 (1923) 424. 
This species was reduced to D. Mildbraedu (Kraenzl.) 
Schltr. by Schlechter in the Berlin Herbarium but on 
comparison of the two type gatherings the differences, 
especially in the floral characters, warrant their separa- 
tion as distinct species. The sepals and petals in D. ten- 
errima are broader and rounded at the apex while the lip 
is transversely elliptical and quite rounded in front in- 
stead of obovate and apiculate as in D. Mildbraedii. In 
vegetative characters there is admittedly a close resem- 
blance between the two species and both came from the 
volcanic area near Lake Kivu. 
Diaphananthe tenuicalcar Summerhayes sp. nov. ; 
affinis D. Stolzii Schltr. et D. Schimperianae (A. Rich.) 
Summerh., ab hae foliis plus duplo minoribus, ab illa 
foliis apice angustioribus lobulis acutis, floribus minori- 
bus sed calcari longiore tenuissimo, ab utraque statura 
minore, inflorescentiis multo brevioribus floribus densior- 
ibus distinguitur. 
Herba verosimiliter epiphytica, glaberrima; caulis 
elongatus, 7-16 cm. longus, circiter 8 mm. diametro, 
apice circiter 3-foliatus, inferne vaginis foliorum delap- 
sorum + circumdatus, radices numerosas reflexo-arcuatas 
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