18S TRIANDRIA— TRIGYNIA. Polycarpou. 



I. H. umbellatum. Umbelliferous Jagged Chick- 



weed. 

 Flower-stalks umbellate. Leaves ovate, acute. 



H. umbellatum. Linn. Sp. Pl.\30. mild. v. 1.489. FL Br. 161. 

 Engl. Bot. v. 1 . t. 27. Rose Elem. append. 445. t. 2.f. 4. Schrad. 

 Germ. r. 1. 415. FL Dan. t. 1 204, not exact. 



II. quae Alsine verna glabra, floribus umbellatis. Dill. Giss.4\. 

 append. 130. t. 6. 



Cerastium umbellatum. Huds. 201. Dicks. H. Sice. fasc. 2. 5. 

 Hook. Lond.fasc. 1. 1. 13. 



Alsine n. 879. Hall. Hist. v. 1 . 386. 



A. verna. Dalech. Hist. 1234./. 



Caryophyllus holosteus arvensis. Ger. Em. 595./. 



On old walls, rare. 



On several walls and roofs about Norwich, especially in the 

 northern part of the town ; first discovered by Mr. Pitchford. 



About Bury. Sir T. G. Cullum, Bart. 



Annual. April. 



Root small, fibrous. Stems weak and partly decumbent, branched 

 from the bottom only, 4 or 5 inches high, round, leafy j smooth 

 below 3 hairy and glutinous at the upper part, between the joints. 

 Leaves hardly an inch long, spreading, single-ribbed, glaucous 

 and rather succulent, quite entire and even at the edges ; ta- 

 pering somewhat at the base into short, broad, combined foot- 

 stalks'. Flower-stalks about 5, terminal, umbellate, simple, spread- 

 ing, at length partly reflexed ; with several small bracteas at 

 their base. Cahjx smooth, brownish. Petals white, with a tinge 

 of red, elliptic-oblong, variously and unequally jagged at each 

 side, not deeply and regularly cloven, as the character of Ceras- 

 tium requires. Stam. in our specimens never more than 3. Styles 

 3. Teeth or valves of the capsule, when perfect, naturally 6. 

 Seeds reddish. Professor Hooker has detailed, with great can- 

 dour and accuracy, the difficulties attending the generic deter- 

 mination of this plant. A new round-leaved species from Nepal, 

 having similarly jagged petals, confirms my opinion of the essen- 

 tial character ; for the corolla of the Caryophyllecs, whose pre- 

 sence separates them widely, in the natural system, from their 

 near allies, is found to afford their best generic distinctions. 



04. POLYCARPON. Allseed. 



Lmn.Gen.42. Juss.299. Fl.Br. \62. Lam.t.5). Gcertn. t.\29. 



Nat. Orel, same as n. 63. 



Cal. inferior, of 5 ovate, keeled, concave, pointed, permanent 

 leaves. Pet. 5, obovate, shorter than the calyx, alternate 

 with it, nearly entire. Filam. 3, sometimes 5, awl-shaped. 



