180 GAMOPETALOUS EXOGEXS 



the corolla. Capsule 5-valved at summit, many-seeded. Smooth 

 sub-agruatics : leaves alternate, entire; flowers racemose, white. 



1. S. floribundUS, Kunth. Leaves obovate-oblong, or spatu- 



late ; racemes long, loose, paniculate ; pedicels bracteolate near the 



middle. 



S. Valerandi. L. $ FL Cestr. ed. 2. p. 595. 



MANY-FLOWERED SAMOLUS. Water Pimpernel. 



Perennial. Stem 8 to 12 or 15 inches high, with slender spreading brunches. 

 Leaves half an inch to 2 inches long, varying from obovate to spatulatc-oblong, and 

 rhombic-lanceolate, slightly fleshy in texture, those on the stem and branches 

 sub-sessile, the radical or lower ones petiolate. Flmvers small, in slender racemes 

 (2 to 4 or 5 inches in length) terminating the branches ; pedicels % an inch to % 

 in length, filiform, with a minute subulate bractlet above the middle. 

 Jfab. Wet, low grounds ; Great Valley: rare. FL July. Fr. Aug. 



Obs. This is now considered sufficiently distinct from the S. Vale- 

 randi, of Europe. 



ORDER LIX. LENTIBIJLA V CEAE. 



Small aquatics, or marsh herbs ; leaves mostly radical, often much dissected ; calyx 

 2-lipped, free from the ovary; corolla personate, or 2-lipped, spurred at base; sta- 

 mens 2 ; anthers 1-celled ; capsule 1-celled, bursting irregularly ; seeds numerous, 

 without albumen. 



258. 1 T TRICUL,A V RIA, L. 



[Latin, Utriculus, a little bottle; from the bladdery sacs on the leaves.] 

 Calyx-lips nearly equal, entire. Corolla personate, the palate 

 prominent; upper lip erect. Leaves submersed, or floating, often 

 capillaceously dissected, and bearing little air-vessels ; scapes emerg- 

 ing, ascending; flowers racemose. 



1. I . VHlif ill-is, L. Stem submersed; leaves decompound, seg- 

 ments capillaceous ; bladders numerous; scape many-flowered. 

 U. macrorhiza. Le Conte, $ FL Cestr. ed. 2. p. 7. 

 COMMON UTRICULARIA. Bladder-wort. Hooded Milfoil. 



Perennial. Stem 1 to 2 or 3 feet long, leafy, immersed and slightly attached by 

 radicles to the mud, at bottom. Leave* 1 to 2 inches long, pinnately decompound. 

 teapes 5 to 10 inches long; fancer* yellow, with brown stripes on the palate, 4 to 8 

 or 10 in a raceme; pc.dicf.l-s about % of an inch in length, bracteate at base. 

 Jfab. Pools, and sluggish streams: not very common. Fl. June. Fr. 



Obs. The views of Major LE CONTE that the multifid append- 

 ages to the stem are genuine roots, and that our plant is specifically 

 distinct from the U. vulgaris of Europe do not appear to be 

 adopted by later writers. 



ORDER LX. OROBANCHA V CEAE. 



ffrsbis, destitute of verdure (n>ftt-para*itcg) ; leurt* and bract* mere scales ; JJmvers 

 didynamous; calyx free from the ovary, persistent; corolla ringent. withering- 

 persistent; capsuJc. 1-celled, 2-valved; valvei each bearing 1 or 2 phicentw; seeds 

 numerous, with transparent albumen. 



