116 R. Pilger. 
Somit treten bei Straussiella ganz die gleichen Farbenvarietüten auf, wie 
wir sie oben bei Clastopus erubescens Hausskn. kennen gelernt haben. Es 
sind folgende: 
Straussiella purpurea (Bge.) Hausskn., |. c., XII (1898), p. 18. — Cla- 
stopus purpureus Bge. in Boiss. fl. or., I, 261; 1867. 
«. genuina; petala purpurea concoloria. 
Inter Ssof et Kohrud (leg. Bunge). — Kuh Kohrud (leg. Strauss; 
V. 1905 flor. et fruct.). 
8. bicolor (Stapf) Bornm.: petala lutea ad basin laminae purpurea. — 
Clastopus bicolor Stapf (Bot. Ergebn. Polak. Exped. n. Pers., II, 33; 1886). 
— Straussiella Iranica Hausskn., Le, XI (1897), p. 79 — Str. bicolor (Stapf) 
Hausskn., 1. c., XII (1898), p. 18. — Bornmüller „Plantae Straussianae“, 
l. c., p. 206. 1905. 
Hamadan: Elwend (leg. Pichler, Strauss). — Latetar; Tefresch; 
Kuh Gerru (leg. Strauss). 
y. perflava Bornm.: petala flava concoloria. — Str. bicolor (Stapf) 
Hausskn. f. unicolor Hausskn. (). — Bornmiiller „Plantae Straussianae“, 
EO. p. 206. 
In consortio varietatis 3. (leg. Th. Strauss). 
XXXIX. R. Pilger, Zwei neue Bambuseae aus Siam. 
(Originaldiagnosen.) 
1. Oxytenanthera Hosseusii Pilger, nov. spec. 
Culmus?; ramuli foliiferi basi squamati, folia superne congesta, la- 
mina papyracea latius lanceolata, basi breviter in petiolum brevem an- 
gustata, superne sensim angustata, subcaudatim producta, pungenti- 
acutissima, superne setis parce inspersa, margine et superne versus 
marginem scabra, subtus hirtulo-puberula, 13—17 em circ. longa, 22— 
25 mm lata, nervis parallelis subtus tenuiter prominulis, transversis nullis, 
vagina setosa, ore auriculis perbrevibus, rotundatis, ligula rotundata, 
efimbriata; florum fasciculi ad ramulos tenues aphyllos vel infra florum 
regionem ad foliiferos, fasciculiunilaterales, alternantes, circ. 6—12-spiculati, 
intermixtis spiculis brevibus sterilibus, basi squamis brevibus nitidis 
cireumdati; spiculae angustae, subulatae, ad 15—17 mm longae; glumae 
vacuae 2 ovales vel late ovales, obtusae vel brevissime apiculatae, mar- 
gine superne dense albido-setoso-ciliatae; flores 2, inferior masculus, 
superior hermaphroditus; gluma florifera inferior anguste elliptica, minute 
mucronulata, rigida, striata, arcte involuta, margine superne albido-setoso- 
ciliata, 12—14 mm longa, palea angusta, marginibus inflexis linearis, 
albido-membranacea, obtusa, 2-carinata, ad carinas arcte implicata, ibique 
