Knowledofe. 



With which is incorporated Harduiclce's Science Gossip, and the Illustrated Scientific Xews. 



A Monthly Record of Science. 



Conducted by Wilfred Mark Webb, F.L.S., and E. S. Grew, M.A. 



J L' L Y , 19 11. 



PLAXT HAIRS. 



By K. i:. STVAN. 



(Cuntinucd truiii Page 766.) 



III. — Branched and StiX(;iN(; Hairs. ornamented with munerous lateral brandies, which 



(eft Thi-: term "compound" is applied to branched are long and very slender, giving the appearance of a 

 hairs, their distinctive feature being that the\- gi\'e person holding up many arms. .Again, in the Deadly 



Figure 1. 

 Hair from the leaf of Garden Rihcs. 



Figure 2. 



Hair from the corolla tube of 

 Deadly Nightshade. 



Figure 3. 



Hair from the leaf of the Chili 

 Nettle iLoasaK 



off lateral branches from the main pedicel instead of 

 from the tip, as do forked hairs. 



Among the branched hairs are all kinds of most 

 extraordinary-looking structures, and man\" of very 

 great loveliness. 



If we examine a hair fnmi the leaf-shcatli of 

 garden Rihes (see Figure 1) we lind that the main 

 pedicel is more or less thick all its length, and 

 distincth" swollen at the base, glandular-tijjped. and 



Nightshade (see Figure 2), a most strange form of 

 branched hair may be found, consisting of a number 

 of thick, clumsy-looking cells, fitting into each other 

 at all sorts of awkward angles, which create an 

 impression of a hand with fingers pointed out 

 and dow n. or of some species of thickly-formed coral 

 from a foreign sea. Every part of this plant — the 

 stem, leaf-surfaces, veins, flower stems, calyx and 

 corolla surfaces, coroiia tube, stamens and stigma — 



247 



