364 LASIOPOGON 



Lasiopogon Cass. Compositae (4). 3 S. Afr., Medit. 



Lasiorrliiza Lag. = Leuceria Lag. p.p. (Comp.). 



Lasiosiphon Fresen. (Giiidia EP.). Thymelaeaceae. 20 palaeotrop. 



Lasiospermum Lag. Compositae (7). 3 S. Afr. 



Lasiospora Cass. = Scorzonera Tourn. p.p. (Comp.). 



Lasiostelma Benth. Asclepiadaceae (n. 3). 4 S. Afr. 



Lasiostoma Schreb. Strychnos L. (Logan.). 



Lassa O. Ktze. = Pavonia Cav. (Malv.). 



Lassonia Buchoz. Magnoliaceae. i China. 



Lastarriaca Remy. Polygonaceae (i. i). 2 Calif., Chili. 



Lasthenia Cass. Compositae (6). 10 W. Am. 



Lastrea Presl Dryopteris Adans. (Folypod.). 



Latace Phil. Liliaceae (iv). i Chili. 



Latanla Comm. ex Juss. Palmae (n). 3 E. Afr., Mascarenes. 



Lateral branching, cf. Branch. 



Latex, a milky fluid contained in special vessels or cells of the tissues, 

 Alismaceae, Apocynaceae, Araceae, Asclepiadaceae, Eitphotbiaceae, 

 Compositae (Cichorieae), Galactia, JMoraceae, Sapotaceae, &c. Cf. 

 Guttapercha, Rubber, Balata ; laticiferous, latex-bearing. 



Lathraea L. Orobanchaceae. 5 temp. Eur., As. L. Si/iiainaria L. 

 in Brit, (tooth-wort) is a total parasite living upon the roots of hazel, 

 beech, &c. It has a thick rhiz. bearing 4 rows of tooth-like scaly 1. 

 The fl. shoot comes above ground and bears a raceme of purplish fls., 

 all bent round to the same side of the infl., protogynous. The scales 

 upon the rhiz. are hollowed, each containing a branched cavity open- 

 ing to the outside by a narrow slit at the base of the back of the 1. 

 This arises by adevelopment similar to that which forms the chambers in 

 the 1. of Empetrum, Cassiope, &c. In the small lat. cavities opening out 

 of the main one there are found peculiar glandular organs, resembling 

 those of insectivorous plants. Small insects, &c. are often found in 

 these leaves (cf. bladders of Utricularia, &c.) and it has been supposed 

 that these organs absorb their proteids like the glands of Drosera, &c. 

 This however is doubtful. L. Clandestina L. is parasitic upon willows. 

 The capsule of L. splits explosively. [For details see Heinricher, 

 Die Schitppenwurz, Stuttgart, 1908.] 



Lathriogyna Eckl. et Zeyh. Leguminosae (in. 3). i S. Afr. 



Lathrophytum Eichl. Balanophoraceae. i Rio de Janeiro. 



Lathyrus (Tourn.). L. (incl. Orobus L.). Leguminosae (in. 9). 

 no N. temp., and Mts. oftrop. Afr. and S. Am. 10 in Brit, (pea), 

 including L. Aphaca L. and L. Nissolia L. The former has large 

 green stipules performing assim. functions, whilst the 1. is transformed 

 into a tendril; the latter has its petioles flattened into phyllodes and 

 has no 1. blade at all (see Acacia). L. macrorrhizns Wimm. has 

 tuberous roots which may be eaten like potatoes. L. sativus L. 

 ( Jarosse) and L. Cicera L. are cult, in S. Eur. as fodder and are also 

 eaten like chick-pea (Cicer). L. odoratus L. is the sweet-pea. The 

 fl. is like that of Vicia; on the style is a tuft of hairs that brushes the 

 pollen out of the apex of the keel, where it is shed by the anthers. 

 L. latifolius (everlasting pea) also cult. orn. fl. 

 Lati- (Lat. pref.), broad; -folius, broad-leaved, &c. &c. 

 Latipes Kunth. Gramineae (3). i Senegal to Sincl. 



