The Plants of Michigan - novelonlinefull.com
You’re read light novel The Plants of Michigan Part 40 online at NovelOnlineFull.com. Please use the follow button to get notification about the latest chapter next time when you visit NovelOnlineFull.com. Use F11 button to read novel in full-screen(PC only). Drop by anytime you want to read free – fast – latest novel. It’s great if you could leave a comment, share your opinion about the new chapters, new novel with others on the internet. We’ll do our best to bring you the finest, latest novel everyday. Enjoy
Herbs, with opposite entire leaves, and minute flowers without petals.
(Prostrate spreading or freely branched plants, 3 dm. high or less; flowers in summer.)
1a. Stipules none; leaves slightly connate at base, subulate =Knawel, Scleranthus annuus.=
1b. Stipules present, but small; leaves elliptical or oval (Forked Chickweed) --2.
2a. Stems p.u.b.escent; internodes seldom more than 1 cm. long =Forked Chickweed, Anychia polygonoides.=
2b. Stems smooth; internodes about 2 cm. long =Forked Chickweed, Anychia canadensis.=
AIZOACEAE, the Carpet-weed Family
Prostrate herbs, with whorled leaves and small whitish axillary flowers without petals, in summer.
One species in Michigan =Carpet-weed, Mollugo verticillata.=
CARYOPHYLLACEAE, the Pink Family
Herbs, with opposite or whorled entire leaves, and stems frequently swollen at the nodes. Sepals 4 or 5; petals separate, as many as the sepals, or rarely none; stamens twice as many as the petals in plants with conspicuous flowers, sometimes fewer in those with small flowers; ovary 1-celled, with the ovules on a central axis, and with 2-5 styles.
1a. Calyx spreading, of separate sepals; flowers 15 mm. wide or less; petals sometimes none --2.
1b. Calyx tubular, of united sepals; flowers in many species more than 15 mm. wide; petals always present --22.
2a. Stipules present --3.
2b. Stipules none --4.
3a. Leaves opposite; flowers pink (about 1 dm. high; summer) =Sand Spurrey, Spergularia rubra.=
3b. Leaves whorled; flowers white (1-5 dm. high; leaves linear; summer) =Spurrey, Spergula arvensis.=
4a. Leaves subulate or thread-like --5.
4b. Leaves linear to ovate --7.
5a. Leaves opposite (1 dm. high or less; flowers white, summer) =Pearlwort, Sagina proc.u.mbens.=
5b. Leaves fascicled in the axils --6.
6a. Styles 4 or 5 (1 dm. high; terminal white flowers 5 mm. wide, in summer) =Pearlwort, Sagina nodosa.=
6b. Styles 3 (1-4 dm. high; flowers white, nearly 1 cm. wide, summer) =St.i.tchwort, Arenaria stricta.=
7a. Petals entire (3 dm. high or less; flowers white, in summer) (St.i.tchwort) --8.
7b. Petals notched or 2-cleft at the end, or none --11.
8a. Princ.i.p.al leaves 1 cm. long or less --9.
8b. Princ.i.p.al leaves 1.5 cm. long or more --10.
9a. Petals half as long as the sepals =St.i.tchwort, Arenaria leptoclados.=
9b. Petals almost as long as the sepals =St.i.tchwort, Arenaria serpyllifolia.=
10a. Leaves oblong-oval, obtuse. =St.i.tchwort, Arenaria lateriflora.=
10b. Leaves lanceolate, acute. =St.i.tchwort, Arenaria macrophylla.=
11a. Capsule splitting by valves at maturity; styles usually 3 (Chickweed) --12.
11b. Capsule opening by terminal teeth at maturity; styles usually 5 (tufted or matted plants, 1-5 dm. high; flowers white, in spring and summer) (Mouse-ear Chickweed) --18.
12a. Petals distinctly shorter than the sepals, or none --13.
12b. Petals as long as the sepals, or longer --15.
13a. Leaves ovate (1-3 dm. high; flowers white, all summer) =Chickweed, Stellaria media.=
13b. Leaves lanceolate to oblong (in water or wet places, 1-4 dm. high; flowers white, in summer) --14.
14a. Flowers in a leafy terminal branching cl.u.s.ter =Chickweed, Stellaria borealis.=
14b. Flowers in a lateral cl.u.s.ter with minute bracts =Chickweed, Stellaria uliginosa.=
15a. Flowers in cl.u.s.ters with leaf-like bracts, or axillary and solitary (in water or wet places; 1-3 dm. high; flowers white, summer) =Chickweed, Stellaria cra.s.sifolia.=
15b. Flowers in cl.u.s.ters with scale-like bracts --16.
16a. Leaves distinctly linear; cymes lateral; a common species in marshes (2-5 dm. high; flowers white, early summer) =Chickweed, Stellaria longifolia.=
16b. Leaves distinctly broadest near the base; flower-cl.u.s.ter terminal --17.
17a. Pedicels erect; cl.u.s.ters usually few-flowered; in extreme northern part of the state only (1-3 dm. high; flowers white, summer) =Chickweed, Stellaria longipes.=
17b. Pedicels spreading; cl.u.s.ters open, many-flowered (2-6 dm. high; flowers white, in summer) =Chickweed, Stellaria graminea.=
18a. Petals distinctly longer than the sepals --19.
