HOLLYHOCK-PINK Alcea Rosea Characteristics Culture Noteworthy

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HOLLYHOCK-PINK Alcea Rosea Characteristics Culture Noteworthy

HOLLYHOCK-PINK Alcea rosea Characteristics Type: Perennial Water: Medium Zone: 2 to 10 Maintenance: High Height: 6.00 to 8.00 feet Suggested Use: Annual, Naturalize Spread: 1.00 to 2.00 feet Flower: Showy Bloom Time: June to August Attracts: Hummingbirds, Butterflies Bloom Description: White, pink, & red Tolerate: Rabbit, Black Walnut Sun: Full sun Culture Grow in average, medium moisture, well-drained soil in full sun. Tolerates a wide range of soil conditions and some light shade, but will not tolerate wet winter soils. Considered a biennial or short-lived perennial. If grown from seed, plant seeds in August or September for bloom the following year. Although short- lived, hollyhocks easily self-seed and can establish colonies in the garden that persist for years as if they were perennials. Noteworthy Characteristics Alcea rosea, commonly called hollyhocks, are old garden favorites. The flowers grow on rigid, towering spikes or spires which typically reach a height of 5-8' tall and usually do not require staking. Foliage features large, heart-shaped (3, 5 or 7 lobes), rough lower leaves which become progressively smaller toward the top of the spire. Long bloom period of June to August. Sometimes listed in nursery catalogs under Althaea. This is a mix of plants which produce huge (4-5" diameter), outward-facing, single flowers in a wide variety of colors including reds, pinks, whites, and light yellows. Problems Foliage is susceptible to rust, leaf spot and anthracnose. Spider mites and Japanese beetle can also be problems. Foliage can become rather tattered and unkempt in appearance when attacked by the aforementioned insects and/or diseases, but the flowers generally are not affected. May need staking, particularly if not protected from wind. Uses Hollyhocks provide excellent architectural height, contrast and a certain amount of old world charm to cottage gardens and border backgrounds. Also effective when grown against walls or fences. Courtesy of Missouri Botanical Society Plant Finder .

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S. M. El Naggar & N. Sawady Pollen Morphology of Malvaceae and its taxonomic significance in Yemen Abstract El Naggar, S. M. & Sawady N.: Pollen Morphology of Malvaceae and its taxonomic signifi- cance in Yemen. — Fl. Medit. 18: 431-439. 2008. — ISSN 1120-4052. The pollen morphology of 20 species of Malvaceae growing in Yemen was investigated by light (LM) and scanning electron microscope (SEM). The studied taxa belong to 9 genera and three different tribes. These taxa are: Abelmoschus esculentus, Hibiscus trionum, H. micranthus, H. deflersii, H. palmatus, H. vitifolius, H. rosa-sinensis, H. ovalifolius, Gossypium hirsutum, Thespesia populnea (L.) Solander ex Correa and Senra incana (Cav.) DC. (Hibiscieae); Malva parviflora and Alcea rosea (Malveae); Abutilon fruticosum, A. figarianum, A. bidentatum, A. pannosum, Sida acuta, S. alba and S. ovata (Abutileae). Pollen shape, size, aperture, exine structure and sculpturing as well as the spine characters proved that they are of high taxonom- ic value. Pollen characters with some other morphological characters are discussed in the light of the recent classification of the family in Yemen. Key words: Malvaceae, Morphology, Yemen. Introduction Malvaceae Juss. (s. str.) is a large family of herbs, shrubs and trees; comprising about 110 genera and 2000 species. It is a globally distributed family with primary concentrations of genera in the tropical and subtropical regions (Hutchinson 1967; Fryxell 1975, 1988 & 1998; Heywood 1993; La Duke & Doeby 1995; Mabberley 1997). Due to the high economic value of many taxa of Malvaceae (Gossypium, Hibiscus, Abelmoschus and Malva), several studies of different perspective have been carried out, such as those are: Edlin (1935), Bates and Blanchard (1970), Krebs (1994a, 1994b), Ray (1995 & 1998), Hosni and Araffa (1999), El Naggar (1996, 2001 & 2004), Pefell & al.
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Hollyhock Rust Caroline Jackson and Josephine Mgbechi-Ezeri
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