150 Materials for a Flora of the Malayan Peninsula. 



Leaves cuneate bifid or pinnatisect with few 



leaflets, stem slender ••• ... ... 3. I. Wallichiana. 



Leaves with trapezoid leaflets, stems slender. 

 Spikes several. 



Inflorescence a simple spike, fruit conic 



cylindric incurved ... ... ... 4. 7. comiculata. 



Inflorescence a compound spike. 



Fruit ovoid ... ... ••• ... 5. I. polymorpha. 



Fruit cylindric curved ... ... ... 6. I. fcrruginca. 



Fruit 2 horned ... ... ••• ... 7.1. bicornis. 



1. I. GEONOMAEFOEMIS, Mart. Hist. Nat. Palm III. 229, 178. 

 Stems short, about 2-3 feet tall few together. Leaves erect cuneate 

 oblong deeply bifid or more or less lobed with from 2 to 9 lobes and a 

 terminal bifid one, lobes acuminate except the crenulate terminal one, 

 18 to 24 inches long dark green strongly ribbed, midrib on both sur- 

 face more or less red tomentose, petiole 1 foot long. Spikes from 

 between the lower leaves, simple or more rarely 2-3 branched, a foot 

 long stout tomentose or slender and glabrous peduncle 3 to 24 inches 

 long. Spathes narrow lanceolate acuminate 6 inches long ^ inch wide. 

 Flowers numerous spiral. Males, sepals short orbicular. Petals ob- 

 long connate at the base ribbed. Female flowers & inch long. Sepals 

 rounded striate. Petals longer ovate cuspidate, shorter than the pistil. 

 Ovary fusiform. Stigmas short recurved. Staminodes 0. Drupe 

 ellipsoid ^ inch long. Seed i inch long longitudinally grooved black 

 ruminate. Hook. fil. Fl Brit. Ind. VI. 415. Slackia geonomaeformis 

 Griff. Calc. Journ. Nat. Hist. V. 469. Palm Brit. Ind. 162, t. 234. 



var. A. typiea. Spike unbranched woolly tomentose stout. 



Singapore: Bukit Timah (Ridley 3140); Malacca: (GriffiitlO, 

 Sungei Hudang (Derry 175), Base of Mount Ophir (Ridley 3141) ; 

 Johor : Gunong Panti (Ridley), Kwala Simpai (Kelsall) ; Pahang : 

 Tahan River (Ridlev) ; Selangor : Ginting Bedai, Rawang, Ginting Peras 

 (Ridley 7881). 



sub. var. ramosa, Inflorescence with 2 to 3 branches. Pahang : 

 Kwala Tenok ( Ridley 3138) ; Singapore : Chan Chu Kang (Ridley 1664) ; 

 Malacca: (Griffith), Mount Ophir (Hullett), Ayer Panas (Goodenough 

 1881); Negri Sembilan : Perhentian Tinggi (Ridley), Tampin Hill Good- 

 enough 1881, 1911); Selangor : Pahang Track (Ridley). 



Griffith's typo of Slackia geonomaeformis belongs to this subvariety. 



var. B. malaccensis. I. malaccensis Becc. Males. III. 102, Hook, 

 fil. I.e. 416. Spike simple slender finely tomontoso or nearly glabrous. 



Malacca : Ayer Panas (Ridley) ; Pahang : Kota Glauggi vRidley) ; 

 Pahang : Bukit Kutu (Bidley 7889); Pahang: Track Form with 3 



