PiM — On the Hairs of the Andrcecimn. 429 



Acanthus montanus. — Arrangement of hairs similar to A. 

 spinosus, hvii sutural hairs not reticulated, and scarcely differing 

 from dorsal, except in having a blunt tip, while the latter are 

 somewhat knobbed. Diameter •0010. Pollen round, smooth 

 (pi. XIX., fig. 19 a and h). 



Thunhergia alata. — Hairs of two kinds — («) clothing edge of 

 anther, pluricellular, upper cells large, spheroidal, thick-walled ; 

 terminal, one or more septate ; lower oblong, all thickly beset 

 with prominent warts ; diameter •0010-*0025 in. (pi. xx., fig. 

 19) ; (5) at base of filament, thick, pluricellular ; cells long, 

 oval, terminal, flattened transversely ; wall rather thin, scarcely 

 at all scabrous ; protoplasm very granular ; proximal segment 

 smallest. Pollen spherical, with enveloping spiral band (pi. xx., 

 fig. 18). 



Justicia speciosa. — Hairs on filament short and thick, or some- 

 what slender ; pluricellular ; slightly scabrous ; wall rather thin ; 

 deep purple ; curved. The endochrome has the remarkable pro- 

 perty, in common with that of the petals, &c., of crystallizing 

 into minute prisms of dark purple colour. Diameter, thick hairs, 

 •0015; slender, •OOIO (pi. xix., fig. 17). 



J. flavicoma. — Anthers glabrous. 



Ooldfnssia aniwphylla. — Hairs on filament long ; flesuous ; lon- 

 gitudinally flattened ; pluricellular ; simple or slightly branched ; 

 wall delicate ; scabrous, with minute warts, as in Nerium, Verbas- 

 cu)u, &G. Diameter -0007 (pi. xix., fig. 16). Pollen nearly 

 round ; furrowed ; slightly roughened. 



Adhatoda cydonicefolia. — Hairs on filament thickly disposed ; 

 pluricellular ; somewhat swollen at septa ; wall well marked ; 

 slightly striate longitudinally; point acute. Diameter -0010 

 (pi. XIX., fig. 20). 



Ericaceje. 



Arbutus unedo. — Expanded portion of filament thickly beset with 

 rather long, extremely delicate, unicellular, simple hairs, which 

 are very slightly scabrous with minute oval projections ; about 

 •0004 in. in diameter. These are the slenderest hairs I have met 

 with (pi. XIX., fig. 21). 



Arbutus procera. — Hairs undistinguishable from those of A. 

 unedo. 



