Flowering plants, magnolias to pitcher plants by Robert H. Mohlenbrock

By Robert H. Mohlenbrock

This quantity, the 8th dedicated to flowering vegetation within the Illus­trated vegetation of Illinois sequence, is the 3rd of a number of dedicated to dicotyledons, which come with such famous crops as roses, peas, mustards, mints, nightshades, milkweeds, and asters. Mohlenbrock right here represents 4 orders and fifteen households of crops. The orders are the Annonales, Berberidales, Nymph­aeales, and Sarraceniales. The fifteen households that include them are mostly conceded via such a lot botanists to be one of the so much primitive dwelling vegetation on the planet at the present time. those orders should be characterised regularly as woody within the Annonales (except for the Saururaceae and a few Aristolochiaceae), herbaceous within the Berberidales (except for the Menispermaceae and a few Ber­beridaceae), aquatic within the Nymphaeales, and insectivorous within the Sarraceniales. As in earlier volumes during this sequence, the typical identify, or names, is the single used in the neighborhood in Illinois. each one species is illus­trated, depicting the distinguishing good points and the habitat in Illinois.

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1. 5 cm across; sepals 3, greenish, smaller than the petals; petals 6-9, greenish-yellow, to 7 cm long, oblanceolate; stamens numerous; pistils numerous, free; fruiting "cone" 4-7 cm long, greenish at first, consisting of a cluster of coriaceous, dark red follicles; seeds 1-2 per follicle, bright red, suspended on a thread. COMMON NAME: Cucumber Tree; Cucumber Magnolia. HABITAT: Rich hardwood forests. RANGE: New York to Ontario, south to Louisiana and Georgia. ILLINOIS DISTRIBUTION: Confined to the southern two tiers of counties in Illinois and Jackson County.

Only the following genus occurs in Illinois. 1. -Pawpaw Small trees with alternate, simple leaves; buds naked, elongated; flowers axillary, solitary; sepals 3, free; petals 6, free; stamens numerous, free; pistils 3-15; ovules numerous; fruit fleshy. This strictly American genus is composed of about ten species. Kral (1960) has monographed the southeastern species. Only the following species occurs in Illinois. 1. ) Dunal, Monogr. Annon. 83. 1817. Fig. 3. Annona triloba L. Sp. Pl. 537. 1753. ) Pers.

Pl. 341. 1753. Fig. 10. Perennial herb with stolons and slender aromatic rhizomes; stems erect, jointed, pubescent at first, usually becoming glabrous or nearly so at maturity, up to about 1 m tall, often branched; leaves alternate, ovate, acute at the apex, cordate at the base, entire, pubescent when young, becoming glabrous, palmately 5- to 9-nerved, up to 15 cm long, up to 8 cm broad, the petioles densely sheathing at the base; spikes 1-2, terminal but often overtopped by the upper leaves, up to 15 cm long, on peduncles up to 8 cm long, the spike strongly hooked or nodding toward the apex; flowers white, sessile or short-pedicellate, subtended by a bractlet, fragrant; perianth absent; stamens 6-8, free, up to 4 mm long, longer than the pistils; pistils 3-4, united at the base, up to 2 mm long, each with a recurved stigma; fruits separating at maturity, each segment up to 3 mm in diameter, strongly rugose.

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