ed a eee 
a SS eee = 
ae oe 
LEGUMINIFERZ. 101 
GENUS XVITZ—LATHYRUS. Zinn. 
Calyx campanulate, 5-toothed, the 2 upper teeth shorter. 
Standard sub-orbicular, spreading, at right angles to the rest of 
the flower. Stamens diadelphous, or sub-monadelphous, with the 
tube transversely truncate. Style bent upwards at right angles to 
the ovary, or curved towards the standard; channelled at the base, 
dilated and compressed toward the apex, hairy on the upper or 
inner side (sometimes apparently on the lower from the style twist- 
ing on its own axis). Pod elongated compressed, many-seeded. 
Herbs, generally climbing, and scarcely distinguishable from the 
genus Vicia by their habit, though generally the leaflets are much 
larger, and only in one or two pairs; sometimes there are none. 
Flowers on elongated axillary peduncles, solitary, subsolitary, or 
racemose, generally large, with a very broad spreading lamina to 
the standard. 
The origin of the name of this genus of plants is somewhat obscure. One author 
says it comes from \a@vpoc of Theophrastus, which is said to be from )a (/a), augmen- 
tative, and Govpoc (thowros), anything exciting, in reference to the qualities of the seeds. 
Another writer suggests that it comes from \ofw, “to lie hidden ;” but that does not 
obviously apply to the habit of the plant. 
Secrion I—APHACA. Tournef. 
Petioles reduced to tendrils. Leaflets only present on the first 
leaves of seedlings, and not always even there. Calyx-tube equal 
and attenuated at the base; teeth longer than the tube. 
SPECIES I—LATHYRUS APHACA. Linn. 
Puate CCCXCVII. 
Root annual. Stem climbing or trailing, angular, not winged. 
Leaflets none. Tendrils branched or simple. Stipules very large, 
ovate, truncate and slightly hastate or hastate-sagittate at the base 
with short auricles, obtuse at the apex. Peduncles axillary, 1- 
flowered. Flowers erect. Calyx-teeth strapshaped - lanceolate, 
nearly equal, much longer than the tube. Corolla not much 
longer than the calyx. Pods linear-oblong, compressed, falcate. 
In cultivated ground, and waste places which have been recently 
disturbed ; rare. In Devonshire, Dorset, Sussex, and Kent, north- 
ward to Worcestershire, Warwickshire, and Lincolnshire. 
England. Annual. Early Summer to Autumn. 
