420 PROF. OLIVER ON PENTACLETHRA MACROPHYLLA. 
EXPLANATION OF THE PLATE. 
Prats XXXVII. 
Figs. 1-7. Pentaclethra macrophylla. 
Fig. 1. Diagram representing the extent to which the valves of the ripe legume become recurved when dry. 
Fig. 2. Strip cut longitudinally from the median portion of a dry valve: a 5, outer surface; c d, inner 
surface. The dotted lines indicate the strips referred to at page 416. 
Fig. 3. Transverse section of a valve. "The pale-coloured bundles, with their larger diameter pereki 
to the surface of the valve, consist of hygroscopic prosenchyma. The inner woody layer of the 
. valve is separated from the contractile bundles by a tolerably well-defined, deeply-coloured 
belt of cellular tissue. 
Fig. 4. Small portion of same, magnified. Small bundles of prosenchyma, apparently similar to those of 
the contractile outer layer (a), occur in the inner layer (b). 
Fig. 5. Transverse section of portion of a valve in which the prosenchymatous bundles are comparatively 
small, magnified. "The bundles are surrounded by a thin-walled parenchyma. 
Fig. 6. Hygroscopic prosenchyma, more highly magnified. 
Fig. 7. Longitudinal section, magnified, showing the anastomosing prosenchymatous bundles traversing 
thin-walled parenchyma. 
Figs. 8 & 9. Section of a valve of a Pisum at right angles to its line of contraction. The inner layers of 
the valve, marked a, are represented more highly magnified in fig. 9. 
Fig. 10. Section of a valve of a Lathyrus made in the direction of the oblique contraction of the valve, but 
transverse to the contracting layer: a, thick-walled hygroscopic contractile layer upon the 
inner face of the valve. 
Fig. 11. Section of a valve of Phanera Vahlii at right angles to its line of contraction : a, innermost layer; 
e, external layer (vide page 417). 
Figs. 12 & 13. Crotalaria incana. 
Fig. 12. Section of valve: a, outer layer; û, median. layer of thick-walled ل‎ ie c, innermost 
. contracting layer of prosenchyma at right angles to .م‎ 
Fig. 13. Section of two inner prosenchymatous nis of same, at right angles to section fig. 12. 
