194 Zygop/iyllacea. [Tribulus, 



Smaller in all its parts than H. Madoblota, and with quite different 

 wings to the carpels. 



Tristillatcia australasica, A. Rich. This, under the name of Platy- 

 ncjiia laiiriffllium^ is recorded by W. and A. (Prod. 107) as from Ceylon. 

 According to Fl. B. Ind. i. 418 the specimens were from Singapore, where 

 it is a common plant, both wild and cultivated. 



XXVII.— ZYGOPHYLLACE/E. 



Herbs ; 1. opposite, pinnate, with stip. ; fl. regular, bisexual ; 

 sep. and pet. 5, distinct, imbricate ; stam. 10, distinct, alter- 

 nate ones (opp. pet.) longer ; disk annular, lo-lobed ; ov. 

 5-celled, with several superposed ovules in each cell, styles 

 combined ; fruit of distinct, indehiscent cocci, each with 

 several seeds ; seed with green embryo, no endosperm. 



TRZBUZ.US, Z. 



For characters, see Order. — Sp. 15; 3 in i^/. B. Ind. 



T. terrestris, L. Sp. PL 387 (1753). Sembu-nerinchi, S. 

 Chiru-nerihchi, T. 



Herm. Mus. 44. Burm. Thes. 226. Fl. Zeyl. n. 168. T.lanuginosus. 

 L. Sp. PL 387; Moon Cat. 35. Thw. Enum. 68. C. P. 1252. 

 Fl. B. Ind. i. 423. Wight, Ic. t. 98. Burm. Thes. t. 106, f. i. 



Annual, with numerous, long, prostrate, more or less hairy 

 or hispid branches ; 1. opposite (the pair usually unequal), 

 pinnate, with 3-6 pair of opposite, nearly sessile Iflts., Iflts. 

 \-\ in., oblong, apiculate, white and silky beneath, slightly 

 silky above, stip. lanceolate, acute ; fl. \-\ in. diam., solitary, 

 axillary or leaf-opposed, ped. slender, shorter than 1. ; sep. 

 linear, acute; pet. rounded, longer than sep., fugacious; ov. 

 bristly, style short, stout ; fr. of (usually) 5, hairy or nearly 

 glabrous, woody cocci, each with 2 pair of stiff sharp spines 

 one pair longer than the other, often muriculate, together 

 forming a more or less spherical spiny ball ; seeds several in 

 each coccus, with transverse partitions between them. 



Low country ; very common in sandy ground, especially in the dry 

 region. Fl. all the year ; bright yellow. 



Distributed throughout the warmer countries of the world. 



A very variable plant. Linn;eus distinguished his T. lafiugtJiosus 

 (the Ceylon plant) by having 5 (instead of 6) pairs of leaflets. 



