282 THE JOURNAL OF INDIAN BOTANY. 



belonging to the second type. Groups of soft bast embedded in the 

 wood cylinder. Pith formed of thin-walled cells. 



Trianthema pentandra L.— Figs. 141, 142, 143. Some of the 

 epidermal cells bladder-like and attenuated at their apices into hair-like 

 structures. Mesophyll bifacial. Clustered crystals near the veins, in 

 the cortex and pith. Veins provided with green bundle-sheaths. 

 Branches angled and grooved. Sclerenchymatous pericycle not 

 developed. Wood belonging to the second type. Pith formed of 

 thick-walled cells. 



Orygia decumbens Forsk.— Figs. 144, 145, 146, 147. Me- 

 sophyll composed of palisade tissue on the adaxial side and of arm- 

 palisade tissue on the abaxial side. Veins not provided with bundle- 

 sheaths. Clustered crystals found near the veins, in cortex and in pith. 

 Axes obscurely angled. Assimilatory tissue in the axis formed of 

 chlorenohyma. Collenchyma developed in the angles. Pericycle 

 forming a composite ring of stone-cells. Wood belonging to the third 

 type. Pith formed of thin-walled cells. 



MollugO hirta Thunb. — Figs. 148, 149, 150. Clothing hairs 

 forming a dense covering of stellate hairs. Mesophyll isobilateral. 

 Star-like bundles of acicular crystals in the mesophyll. Veins 

 embedded and without bundle-sheaths. Assimilatory tissue formed 

 of chlorenchyma. Clustered crystals found in the cortex and in the 

 pith. Pericycle formed of a composite ring of atone-cells. Pith 

 composed of thin-walled cells. 



Mullugo nudicaulis Lam.— Figs. 151, 152, 153. Mesophyll 

 bifacial. Styloids found in the spongy tissue. Veins embedded and 

 without sheaths. Clustered crystals in the neighbourhood of the 

 veins. Assimilatory tissue in the axis formed of chlorenchyma. 

 Structure of wood belonging to the first type. Pith formed of thin- 

 walled cells. 



Mullugo Cerviana Ser. — Figs. 154, 155. Some of the epider- 

 mal cells larger and with water-storing function. Mesophyll isobila- 

 teral. Veins embedded and provided with green bundle-sheaths. 

 Assimilatory tissue in the axis in the form of chlorenchyma. Scleren- 

 chymatous pericycle forming a composite ring. Structure of wood 

 belonging to the first type. Pith formed of thin-walled cells. 



Gisekia pharnaceoides L. — Fig. 156. Leaves sub-fleshy. 

 Mesophyll bifacial. Veins embedded and without bundle-sheaths. 

 Bundles of acicular crystals found near the veins, in the cortex and 

 in the pith. Axes angled. Sclerenchymatous pericyole forming a 

 composite ring. Structure of wood belonging to the third type. 

 Pith formed of thin-walled cells. 



Limeum indicum Stocks.— Figs. 157, 158, 159. Some of 



