TETRANDRIA. MONOGYNIA. Sherardia. 219 
E. septan gula're. Stalk with seven angles, sheathed at the base; 
leaves sword-shaped. 
( Hook. FI. Lond. 52. E.)—- E. Bot. 733 — Phil. Tr . lix. p. 243 — Penn. 
Hebr. i. 39, at p. 314. 
Grows under water. Stalk one foot to one foot and a half high, the top 
rising above the water when in flower. Lightf. Fringe of the calyx 
white. Petals white, with a black spot on the limb. Hope. 
Dr. Hope sent the plant to Linnaeus, who, as he afterwards informed me, 
said it was E. decangulare; but Dr. Hope in his excellent description, 
represents the stalk as having only seven angles, and sheathed at the base. 
Phil. Tr. v. 59. If the figure of Plukenet, 409, 5, is to be relied upon, 
the American plant, which Linnaeus called E. decangulare, wants the 
sheath on the stalk; the proportion of the leaves is also different; and 
from the character given to it by Linnaeus, the stalk has ten angles, and 
the barren flower four stamens, so that I am disposed to believe that the 
British plant is really a different species, and have named it accordingly. 
(The beautiful and singular structure of the roots, jointed as a Conferva ; 
the leaves pellucid and cellular; and the terminal head of flowers, with 
their purple exserted anthers, and curious scales, are admirably delineated 
in FI. Lond. E.) 
Wreathed Pipe-wort. (fE. decangulare. Lightf. E.) Nasmythia arti- 
calata. Huds. Discovered by Mr. Robertson, a pupil of Dr. Hope, in a 
small lake in the Isle of Sky, in 1768. In two or three small fresh 
water lochs about a mile west of Loch-sligachan, in the Isle of Skye, but 
particularly in a small lake called Loch-na-Caiplich close to the road side 
between Sligachan and Drynoch, in such abundance, that the white fibres 
of the roots are thrown on the edges of the loch as sea weeds on the sea 
shore. Lightfoot. It recently appears, by a note in the handwriting of 
Dr. W alker, of Edinburgh, that this rare plant so early as Sept. 11, 1764, 
in a small lake by the road side, leading from Sconsar to Giesto, in Skye, 
attracted the attention of Sir John Macpherson, who with the zeal of an 
ardent naturalist, leaped from his horse, waded into the water, and 
brought out the prize : as recorded in Hook. Scot. In lakes and ditches 
about Cunnamara, Ireland. Mr. T. Mackay. Sm. Eng. FI. Abundant 
in the lakes of Rosses, Donegal. E. Murphy, Esq. E.) P. July—Sept. 
SHERAR/DIA* Bloss. one petal, tubular, long : Seeds two, 
naked, crowned by the calyx, as with three teeth. 
S. arven'sis. All the leaves in whorls ; flowers terminal. 
Curt. 315— (E. Bot. 891. E.)— FI. Dan. 439— Blair. 4. 6—Pet. 30. 10— J. 
B. iii. 719. 3—Barr. 766, and 541. 1. 
The whole plant is harsh and rough with hairs, from four to seven inches 
high. ( Stems several branched, spreading, mostly decumbent, square, 
leafy. Flowers in one umbel. E.) Leaves five or six in a whorl. 
Floral-leaves terminating, compressed, deeply divided into eight parts, 
and inclosing three or four florets. Calyx with four, five, or six teeth. 
Blossom blue or purple: tube very long, segments egg-shaped. (This 
slender little plant is of a dark green, and has much the habit of a Galium 
Grev. E.) 
* (In honour of Dr. William Sherard, born at Bushby, Leicestershire, 1659, some¬ 
time Consul at Smyrna, a distinguished patron of science, reputed author of Schola Bo- 
tanica, founder of the botanical professorship at Oxford, and the collector of twelve 
thousand species of dried plants, Died 1728. E.) 
