MB. C. B. CLABKE ON INDIAN SPECIES OF CTPEBUS. 161 



C. nudiculmis, Sieber, MS. in h. propr. 



Papyrus rlehiscens, Nees ! in Wight Contrib. p. 89. 



C. Pangorei, Nees ! in Wight n. 1844, h. propr., in Wight Contrib. p. 88 



pro majore parte. 

 C corymbosus, Nees in Wight Contrib. p. 89 (syn. Rottb. excl.). 

 Cyperus, Wall. ! List n. 3332 A ( = C. tegetum, h. Roxb. !). 

 Cyperus, Wall. ! List n. 3329, I partira. 



Cyperus, Wall. ! List n. 3352, A, B, C (cum C. malaccensi mixta), D. 



Cyperus, Wall. ! List n. 3330, exemplum alterum. 



Tegetum materies, a Doctore Gr. King sub nomine O. tegetum a 



Calcutta commuuicata. — Rhizorua lignosum, breviter repens. 



Culmi solitarii aut approximati, 5-8 dm. longi, trigoni. Folia in 



exemplo Roxburghii 3, summum usque ad 14 cm. longum ; vaginae 



saepius nudae, a folio 2-8 cm. longo rarius terminatae. Involucri 



bracteae saepe 3 dm. longae, erecto-patentes proventu patulae, in 



marginibus serrulato-scabrae, umbellam fere semper conspicue 



superautes. Umbella 1-3 dm. in diam. ; radii 4-12, usque ad 



8-16 cm. longi; ocbreae 15 mm. longae, laxiusculae. TJmbellu- 



larum radioli 3-8, usque ad 4-9 cm. longi, saepe iterum umbel- 



lulati. Spicae longae 5-10 mm., 4-10-spiculosae ; spiculae longae 



2 cm., latae 2-3 mm. (in exemplo Eoxburghiano majores), 10-20- 



florae, in dorso virides, in lateribus pallidae aut (maturae) saepius 



brunneae aut rubrae, in Africanis interdum castaneae. Glumae 



longae 2-3 mm., obtusae, fere truncatae, vix carinatae, 3-7-nerviae. 



Stamina 3, subinclusa ; antherae lineari-oblongae, muticae vel 



obsolete cristatae, fusco-sanguineae. Stylus nuce multo brevior ; 



rami 3, e gluma breviter exserti. Nux breviter angustata, nigro- 



brunnea ; cellulae extimae quadratae, emarcidae, byalina;, porosae. 



[This plant, abundant in India, is the authentic C. tegetum, 

 Roxburgh ; it differs decisively from C. corymbosus in the much 

 more distant glumes, which in the dried specimens have the 

 margins incurved not overlapping. The spikelets are more com- 

 pressed than those of C. corymbosus. The colour in India varies 

 from pale to a high red-brown : with the more highly coloured 

 Indian examples many African are absolutely identical; but 

 there are other African specimens chestnut or almost black. It 

 is far more difficult to distinguish C. tegetum in Africa from 

 C longus and its various forms called C. badius ; the only absolute 

 distinction appears to lie in the much longer leaves of C. longus. 

 The rhizome of C. longus differs a good deal from that of C. tege- 

 tum, as is evident enough when you have the tohole of the rhi- 

 zomes to compare, which may be once in a hundred specimens. 



LINN. JOUBN. — BOTANV, VOL. XXI. M 



