288 COMPOSITE. IvA. 



habit of Glaux maritima. Leaves about an inch long, varying from 2 lines 

 to half an inch in breatlth, j)ale ; the close strigose pubescence (traces of 

 which are almost always visible with a lens) scarcely perceptible to the 

 naked eye except on the margins. The involucral scales are sometimes 

 nearly or quite distinct (I. axillaris, Nut.l. I. c. excluding the reference to 

 Hooker) ; sometimes variably united, as described and figured by Hooker, 

 when it is the 1. foliolosa, Nutt. I. c. But Mr. Nicollet's si)ecimens from the 

 Missouri (in which the leaves are as evidently 3-nerved and hairy as in any 

 state of the species,) have the scales in some instances united to the middle, 

 while more commonly they are nearly distinct.- 



4. 1. micro'cephala (Nutt.) : stem slender, glabrous, virgately branched ; 

 heads very small, nearly sessile in the axils of the narrowly linear and fleshy 

 sessile entire alternate leaves, nodding ; scales of the involucre 4-5, distinct; 

 flowers about 6, three of them pistillate. — Nutt. ! in trans. Arner. jMl. soc. I. c. 



Florida, Dr. Baldicin! — Leaves about half an inch long and half a line 

 wide : the capitula not larger than an ordinary pin's head. Nutt. 



§ 2. Scales of the many-jloivered involucre 6-9, imbricated in 2-4 series. 



5. /. imbricata (Walt.) : perennial, herbaceous or nearly so, mostly gla- 

 brous ; branches ascending ; leaves commonly alternate, fleshy, lanceolate, 

 mucronulate, tapering to the base, sessile, obscurely 3-nerved, entire or den- 

 ticulate serrate ; heads solitary or in pairs in the axils of the upper leaves, on 

 short pedicels, forming foliaceoas spikes or racemes ; exterior scales of the 

 involucre orbicular, fleshy, with a narrow scarious margin ; the interior ob- 

 ovate, the scarious margin lacerate-denticulate; fertile flowers 2—4; chaff of 

 the receptacle linear-spatulate, denticulate at the summit. — Walt.! Car. j^- 

 232; Michx.! fl. 2. p. 184,- Pursh ! fi. 2. p. 580; Ell.! sk. 2. p. 475; 

 DC. ! prodr. 5. p. 530. 



Sandy sea-shore, N. Carolina ! to Florida ! and Louisiana ! Also Key 

 West, Mr. Blodgett ! July-Oct. — Plant 1-2 feet high, suffrutescent at the 

 base. Leaves about an inch long. Corolla of the fertile flowers very small 

 and short, 5-parted or irregularly cleft. Fertile style divided nearly or quite 

 to the base ; the branches linear, rather obtuse, one of them sometimes abor- 

 tive. Sterile flowers numerous. Achenia slightly compressed. — " Leaves 

 of the fertile branches linear; of the barren ones cuneate-obovate. and ser- 

 rate-toothed : the plant has an extremely strong odor of honey." M. A. 

 Curtis, mss. 



§ 3. Involucre turbinate, composed of 3 scales united nearly to the summit, 

 3-6-Jiowered, the fertile flowers solitary. — Monachsena. 



6. /. angustifolia (Nutt.) : annual, strigose-pubescent : stem erect or de- 

 cumbent at the base, much branched ; leaves narrowly linear or lanceolate- 

 linear, 1— 3-nerved, tapering at the base or somewhat petioled, entire, the 

 lower often denticulate ; heads (small) subsessile, deflexed, forming narrow 

 virgate leafy spikes ; chaff of the receptacle filiform, minute. — Nutt. ! in 

 DC. prodr. 5. p>' 5~9' '■V'"' t^o-^^s- Amer. phil. soc. I. c. 



Prairies, Arkansas, Nuttall ! Dr. Leavenworth ! Western Louisiana, Dr. 

 Hale ! Texas, Drummo)ul ! Dr. Leavenworth ! Aug.-Sept. — Stem 1-3 

 feet high. Leaves &c. minutely pubescent and somewliat canescent with 

 appressed strigose hairs; the lower 1-2 inches long and 1-3 lines wide; the 

 upper much narrower ; the bracteal ones almost setaceous. Spikes very nu- 

 merous, 4-G inches long. Heads scarcely more than a line in length, fre- 

 quently with only 3 flowers, two of them staminate. Sterile style abor- 



