Cyperus. | CLVI. CYPERACEE (CLARKE). 373 
Nile Land. British East Africa: Rabai Hills, near Mombasa, Taylor ! 
Mozamb. Dist. Zanzibar, Kirk / Hildebrandt, 1073! 
This may be an extreme form of C. digitatus, Roxb., but no example of this 
widespread species comes near it in size; the rays of the umbel in C. grandis are 
4-4 in, in diam. 
115. C. auricomus, Sieber ex Spreng. Syst. i, 230. Stem at the top 
triquetrous with concave faces, or almost 3-winged, otherwise as 
C. digitatus, Roxb.—Boiss. Fl. Orient. v. 373; Boeck. in Flora, 1879, 
555; Ridley in Trans. Linn. Soe. ser. 2, Bot. ii. 142; C. B. Clarke in 
Journ. Linn. Soc. xxi. 188 partly, and in Durand & Schinz, Conspect. 
Fl. Afr. v. 549; K. Schum. in Engl. Pfl. Ost-Afr. C. 121; Durand & 
Schinz, Etudes Fl. Congo, i. 284; Rendle in Cat. Afr. Pl. Welw. ii. 118; 
not of F. Muell. ©. ornithopodioides, Delile, Fl. AXgypt. Il. ii. (1812) 50, 
name only. C, awricomus, var. subalatus, Aschers. & Schweinf. Ill. Fl. 
Egypte, 156. (. xanthocomus, Link, Hort. Berol. i. 316 (efr. ii. 320). 
C. Wiestii, Steud. Syn. Pl. Glum. ii. 35. C. venustus, Presl in Oken, 
Isis, xxi. (1828) 271 ; Kunth, Enum. ii. 68 partly ; Boeck. in Linnea, 
xxxvi. 316 partly. C. subalatus, Boeck. in Linnea, xxxvi. 291, not of 
Steud. (©. rhaphiostachys, and C. racemosus, Boeck. in Peters, Reise 
Mossamb. Bot. 541. C. aureorufus, Boeck. in Linnea, xxxvili. 369; 
Eng]. Hochgebirgsfl. Trop. Afr. 143. 
Upper Guinea. Senegal, Sieber, 3! Roger, 67! Afzelius! Senegambia, 
Heudelot, 322! 500! Dahomey, Newton, 8! 9! Niger Territory: Nupe, Barter, 
1565! 
Nile Land. Kordofan, Pfund, 411! 463! 633 ! Abyssinia : Shireh Province, 
Petit! Begemeder Province, Schimper, 709! 1403! British East Africa: Bongo ; 
Addai, Schweinfurth, 1427! Kitch; banks of the Nile at Gaba Shambe, 1192 ft., 
Petherick ! 
Lower Guinea. Angola: Huilla; swamps by the Mupanda River, Welwitsch, 
6870! Barra do Dande; banks of the River Dande, Welwitsch, 7042! Loanda ; 
marshes and ponds near Boa Vista, Welwitsch, 7043! Barra do Bengo; marshy 
places by Lake Quifandongo, Welwitsch, 7080! 
Mozamb. Dist. Portuguese East Africa: Zambesi, Peters, 8! British Central 
Africa : Boruma, on the Zambesi, Menyharth, 1059! 
Common in Egypt. 
. This species is very near C. digitatus, Roxb., and is distinguished primarily by 
its acutely triquetrous stem; the umbel smaller, slenderer, with usually very unequal 
Tays. The colour varies from straw-colour (at low levels) through yellow to a golden- 
brown (at high levels)—the C. awreorufus of Boeckeler ; but there is no red or 
chestnut-red in the material referred above to this species. At least, this is the 
view of the colouration here accepted ; the copious synonymy above cited shows that 
competent cypero'ogists have estimated the colour as of specific value. 
- Var. minor, C. B. Clarke in Durand & Schinz, Conspect. Fil. Afr. v. 550. 
Slender. Umbel small. Spikelets slender, chestnut-red.—C. rotundus, Aschers, & 
Schweinf. Ill. Fl. Egypte, 157 partly. a 
Mile Land. Gulabat: region of Matamma, Schweinfurth, 2025! British 
East Africa: Kitch; banks of the Nile at Gaba Shimbe, Petherick, 25! 
Schweinfurth, 2025, was the type of this variety, and should perhaps be referred 
to C. longus, var. tenuiflora, of which it has the rhizome and chestnut-red spikelets ; 
but the spikelets are too slender for C, longus or C. rotundus, and the wings of the 
