ROTTBOELLIA.  ANDROPOGONEJE (AUCT. EDUARDO HACKEL). 313 
appressi vel, ubi spiculæ sessiles geminze, iis oppositi, planiuseuli, 
ceterum more articulorum lanati. Spiculæ pedicellatze 5—7 mm. lon- 
gw sessilibus simillimz nisi gluma II^ ecarinata, flores ambo c? vel 
cum glumis IIT*, IV* et paleis aborientes. 
In desertis /Egypti (e. gr. pr. Cahiram a multis lecta), Nubiz pr. 
Dongola (Ehrenb.), Arabis Petre: (Bové), secus maris Rubri litora 
eum afrum (pr. Sues 1. Ascherson, Suakin 1. Sehweinfurth 1191) tum 
arabicum (Dschedda 1. Schimper 791); pr. Maseat (Aucher 5460); 
in Affehania (Griff.) presertim in valle Kurram (Aitchis. 532), Belut- 
schia (Stocks), Indie or. regione Sindh (Stocks in h. Boiss.). 
Obs. 1. Specimina arabica spiculas habent minores, brevius acumi- 
natas; indicis et affghanieis vagina nodi sunt pubescentes, culmi 
superne puberuli. 
2. Species fere subgenus proprium (Lasiurus) formare deberet, a 
Ceelorhachi praesertim (pr&ter spieulas villosas) gluma I= acuminata, 
stigmatibus elongatis exsertis diversum. Etiam Ischaemo valde affinis 
est, minus vero Elionuro. 
Species inextricabilis : 
R. brevis Chauvin ap. Steud. Synops. 1, p. 361 (Urville leg. in 
ins. Waigiou). 
Species exclusa : 
1. R. villosa Poir. Encycl. 6, p. 313, verisimiliter Andropogonis 
species e sect. Schizachyrio, vel Isch@mi ? 
2. R. ocreata Trin. in Mém. Ac. St.-Petersb., ser. 6, vol. 2, 
p. 250. E Brasilia see. Trinium, qui tamen nee locum specialem, nec 
colleetorem, nee, in quo plantam viderat, herbarium indicavit. Desi- 
. deratur in ipso herb. Triniano. Vix dubito quin sit varietas mutica 
cujusdam Andropogonis speciei e sect. Schizachyrio perinde ac Rott- 
boellia Salzmanni Trin. ap. Steud. Synops. 1, p. 361, quæ Andropogon 
imberbis Hack. 
3. R. pilosa Roth in Rem. et Schult. Syst. 2, p. 785; R. trichan- 
tha Roth nov. sp. pl. p. 43, vix dubie ad Chlorideas (Enteropogo- 
nem ?) mandanda. 
4. R. biflora Roxb. Fl. Ind. ed. Carey 1, p. 357, R. Roxbur- 
—. ghiana Schult. Mant. 2, p. 430, ad Hordeeas (Leptureas) mandanda. 
