4 
Macroscopic characters. 
| Thouarsii. Rumphii. circinalis. 
Height Up to 6 me x to over 6 m. (oc-| Up to 5 mi. (occasion- 
of stem casionally 3] ally 12 m.). 
begins to flower when| 
barely 2 m. hi 
Fronds Up to over 1 e — 1-2 m. long . éfe ly Es 4 si 2°5 m. _ ong 
Spines 1-1-5 cm. apart -| 2-8 om. apart, .| 1-2 cm. apart, 
of petiole 
umber Up to 65 vee 50-70 aa -«.| 80-100. 
of pinnae 
Distance lcm. apart ... -| 1°2-1°5 cm, apart ... 
of pinnae 
Shape and Gently curved, linear,) Rather ir bal oe Gently curved, linear 
dimensions 20-30 cm. by 0°8-| ear, Sig 18-24 em. by 0°9-13 
-of pinnae 14 cm. 15-17 m cm. 
Midrib of Grooved above .| Grooved shots .| Not grooved above. 
pinna when 
ro) sporophylls Acumen short Acumen reflexed or} Acumen long, gradu- 
abruptly recurved recurv ally tapering. 
2 sporophylls Blade ovate-lanceo-| Blade short, = Blade long acuminate, 
late, crenulate sparingly and m serrate with numer- 
utely thed = ous, sharp narrow 
serrate, rarely lobed, th, m. flat 
from a terete narrow| broad claw 
claw 
Seed Ellipsoid-globose, bn eer i _subglobose, Ovoid to globose 2°5- 
2 ver 6 cm, | m. by 3°75-| 5 cm, in diam. 
oes characters. 
Thouarsii. Rumphii. circinalis. 
Zambesi mouth, ngapore, Bangalore, 
r Ridley 4408 . Cameron 497, ; 
Pinna half-wa ahi cells form-| Palisade cells form- Piet cells ae = 
between midrib g half the section) ing more than half he on 
and margin w vhich is 0°5 mm. in} the section which is which is ge 35 
idth. There are 3} about 0°5 mm. in 
or 4 ] of width. There are see about Siayuust 
essory transfusion 5 a f ac-| accessory  transfu- 
tissue and 2 layers of sory transfusion} sion tissue ae 1 
spongy parenchyma tiene sina ve layerof} layer of spon 
ec A well de-| spongy p art bape parenchyma ce 
veloped cuticle is ls. The cuticle The cuticle is not 
presenton theupper| very strongly ie ell devel on 
epidermis and a less} veloped above and is wher side... The ; 
developed one onthe distinct below. The ta are numer- 
lower. The stom numerous stoma the lower 
are numerous an re limited to the} surface and on the 
the lower| lower surface sides of the midrib. ee 
Margins ot slightly revit, with Mad alignhly revo- vo slightly revo- — 
the pin or layers of) lute, with one layer| lute, with very Hetle 
aie eren a and a a ge Pahoa erenchyma and a ~ 
very strong cuticle | forming a strong cuticle. 
ermis and a ver. — 
strong cuticle : 
Midrib of With furrows an a piper ri ve and] Convex above a and 
pinna small median ome convex below, with| slightly ve 
on both sides. A) a ‘thicke ned ppl ont eles with a alight 2 
little thick - walled) derm a ly thi — sheath 
the poet dle 
inconspicuous thick, | but 
ened sheath 
round 
ins bundle 
iclavenictese. 
