10 DIAND. MONOG. 



8. SALVIA. 



1. S. verlenaca (wild English Clary), leaves serrate sinuate, co- 

 rolla narrower than the calyx. Lig/i/f. p. 79. E. B. t. 154. 



HAB. Pastures and banks, rare. Salisbury crags, and bank entering 

 Kirkcaldy from Dysart, Light/. Burntisland and near Pettycur, 

 Edinb., Maitgk. Fl. June. 3/ . 



One or two feet nigh,. Lower leaves petiolate, ovate, lobed or sinu- 

 ated and crenate rather than serrate ; upper ones sessile, more 

 acute, less lobed, but deeply serrated j all rugose, veined. Brae- 

 teas two under each whorl, cordate, acute, entire, ciliated. Cal. 

 hairy, segments mucronate. Cor. small, purple, ringent. Upper lip 

 concave, compressed. Lower lip three -lobed, middle lobe large. 



9. LEMNA*. 



1. L.trisulca (Ivy-leaved Duckweed), fronds thin elliptico-lan- 

 ceolate caudate at one extremity at the other serrate^ roots 

 solitary. Light f. p. 53?. E. B. t. 926. 



HAB. Clear stagnant waters, as in Duddingston Loch, Dr. Parsons 

 in Light/. Fl. June, July. Q. 



The most delicate of the genus. Fronds one-half to three-fourths of 

 an inch in length, pellucid at the margins, reticulated. The young 

 fronds, which are continually produced from the lateral clefts in this, 

 as in all the following species, are of exactly the same shape as the 

 parent plant, and are again proliferous before they are detached. 

 A frond may thus be seen to be triply pinnate with its offspring. 



* A most singular genus, whose characters have not been at all accu- 

 rately defined by any author. I have been fortunate in meeting with two 

 species, L. trisulca and minor, in all stages of fructification, a more complete 

 analysis of which than has yet been given I hope to publish soon in the Fl. 

 Land. All the species are aquatics, floating on the surface or sinking only 

 when the seed is ripe, and the plant dying away. Fronds (for I cannot con- 

 sider the whole plant, from which spring the flowers, as a leaf) minute, ovate 

 or orbicular, compressed, foliaccous or thick and succulent ; from the centre 

 beneath throwing out one or more long slender roots, which are terminated 

 by a sheath-like appendage, resembling the calyptra of a moss. The mar- 

 gins of the fronds at one extremity, on each side, have a cleft in which some- 

 times are produced one or more flattened, orbicular Gemmae (and this is their 

 common mode of increase), which there grow into perfect fronds, and then fall 

 away, or a single flower consisting of an urceolate, membranaceous, mono- 

 phyllous perianth, from a small opening in the top of which the stigma is 

 protruded, and which hursts irregularly as the stamens become developed. 

 These are two in number (rarely wanting). Anthers of two rounded lobes, 

 opening nearly vertically each into two valves, Germen roundish, com- 

 pressed, carinated on one side, tapering into a style about its own length, 

 and terminated by a flattish rather expanded stigma. Fruit a Utricle, trans- 

 versely oblong, compressed, emarginate at the top, on which is the short 

 persistent style. Seed one, very hard, oval, lying horizontally in the Utricle, 

 and fixed by its lower side. Embryo oblong, monocotyledonous, horizontal, 

 central, surrounded by a whilish, fleshy albumen. 



