Psidium L.

Guava (en)

Genus

Angiosperms > Myrtales > Myrtaceae

Characteristics

Shrubs or trees. Leaves opposite or subalternate, the lateral nerves mostly ascending, arcuate-anastomosing without forming a distinct marginal nerve. Inflorescence cymose, 1-to 7-flowered; peduncles in the axils of the lower often bract-like leaves of lateral branchlets. Flowers large or medium-sized. Receptacle produced above the ovary. Calyx closed in the bud or open and then truncate or 5-lobed, at anthesis irregularly 3-to 5-fid, sometimes at length irregularly circum-scissile. Petals 5, orbiculate or obovate, white. Stamens numerous, the filaments incurved in the bud; anthers dorsifixed, dehiscing longitudinally. Ovary 2-to 7-celled, many-ovulate; placenta 2-lamellate; ovules in a single or triple row; stigma capitate or peltate. Berry mostly globose, many-seeded; seeds embedded in pulp, the testa dull, hard. Embryo incurved; radicle elongated; cotyledons very short.
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Shrubs or small trees. Leaves opposite, pinnately veined; pellucid glands minute. Inflorescence axillary, of 1–3 (–7)-flowered cymes. Flowers showy, sessile on pedicel-like peduncle; perianth and stamens epigynous. Hypanthium campanulate or pyriform, prolonged above ovary. Sepals 4 or 5, connate in bud, distinct at anthesis or splitting irregularly down to ovary (forming 2–5 calyx lobes). Petals 4 or 5, free, spreading, inserted on calyx lobes, caducous, often showy. Stamens numerous, free, shorter than petals. Ovary inferior, (2–) 3–5 (–7)-locular; ovules numerous. Fruit a berry, usually crowned with persistent sepals. Seeds usually numerous, bony, embedded in a juicy pulp.
Shrubs or small trees. Bark gray, smooth. Branchlets pubescent. Leaves opposite, petiolate; leaf blade pinnately veined. Flowers axillary, large, usually 1 or 2 per axil. Bracts 2. Hypanthium campanulate or urceolate. Calyx lobes 4 or 5, unequal. Petals 4 or 5, white. Stamens many, separate, in many whorls; anthers ellipsoid, basifixed, locules parallel, longitudinally dehiscent. Ovary inferior, adnate to hypanthium, 4-or 5-loculed or more; ovules numerous. Style linear; stigma expanded. Berry globose to pyriform, fleshy, many-seeded, apex with persistent calyx lobes; placenta well developed, fleshy. Seed coat hard; embryo curved; hypocotyl long; cotyledons short.
Shrubs or trees. Lvs opposite, not obviously glandular. Fls axillary, solitary or few in dichasial cymes, often large. Hypanthium campanulate or pyriform, prolonged above ovary, splitting irregularly at or after anthesis; calyx limb 4-5-lobed. Petals 4-5, free, spreading, ± caducous. Stamens numerous, in many series, free, < petals; anthers dorsifixed. Ovary usually 4-5-celled; ovules many; style often > stamens. Fr. baccate and very fleshy, globose, ovoid or pyriform, usually with persistent calyx lobes; seeds few to many.
Trees or shrubs. Leaves opposite (at least in ours). Inflorescence axillary, 1–3-flowered. Calyx unlobed and almost or completely concealing the corolla before anthesis, subsequently splitting irregularly into 4–5 lobes, persistent. Petals 4–5. Stamens numerous, free. Ovary imperfectly (2–)4–5(–7)-locular with 4–5 intrusive parietal placentas; ovules numerous. Fruit a berry with numerous angular seeds.
Calyx unlobed and almost or completely concealing the corolla before anthesis, subsequently splitting irregularly into 4–5-lobes, persistent.
Ovary imperfectly 4–5-locular, with 4–5 intrusive, parietal placentae; ovules numerous.
Fruit a berry with numerous angular seeds.
Inflorescence axillary, 1–3-flowered.
Stamens numerous, free.
Trees or shrubs.
Petals 4–5.
Life form -
Growth form
Growth support -
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
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Rooting depth (meter) -
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Flower color
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Nitrogen fixer -
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Environment

Light -
Soil humidity -
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Hardiness (USDA) 7-12

Usage

Grown for their edible fruit.
Uses -
Edible -
Therapeutic use -
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Animal toxicity -

Cultivation

Mode -
Germination duration (days) 30 - 60
Germination temperacture (C°) 21 - 23
Germination luminosity -
Germination treatment soaking
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Optimum temperature (C°) -
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Images

Psidium unspecified picture

Distribution

Psidium world distribution map, present in Australia, China, New Zealand, Panama, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:30004423-2
WFO ID wfo-4000031762
COL ID 746H
BDTFX ID -
INPN ID 445849
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Guaiava Guajava Cuiavus Guayaba Psidium

Lower taxons

Psidium australe Psidium celastroides Psidium guajava Psidium guineense Psidium longipetiolatum Psidium macahense Psidium maribense Psidium minutifolium Psidium myrtoides Psidium orbifolium Psidium refractum Psidium rostratum Psidium rufum Psidium rutidocarpum Psidium salutare Psidium sintenisii Psidium sorocabense Psidium acidum Psidium acunae Psidium acutangulum Psidium albescens Psidium appendiculatum Psidium balium Psidium densicomum Psidium dictyophyllum Psidium donianum Psidium eugenii Psidium firmum Psidium glaziovianum Psidium grandifolium Psidium hotteanum Psidium inaequilaterum Psidium itanareense Psidium jakuscianum Psidium kennedyanum Psidium langsdorffii Psidium myrsinites Psidium nutans Psidium oblongatum Psidium oblongifolium Psidium oncocalyx Psidium parvifolium Psidium pedicellatum Psidium pigmeum Psidium reversum Psidium rhombeum Psidium riparium Psidium robustum Psidium schenckianum Psidium striatulum Psidium tenuirame Psidium trilobum Psidium guyanense Psidium oligospermum Psidium amplexicaule Psidium cattleianum Psidium scopulorum Psidium brevifolium Psidium brownianum Psidium calyptranthoides Psidium fulvum Psidium haitiense Psidium montanum Psidium munizianum Psidium ovale Psidium acranthum Psidium bahianum Psidium ganevii Psidium araucanum Psidium huanucoense Psidium cauliflorum Psidium reptans Psidium jacquinianum Psidium ramboanum Psidium mattogrossense Psidium verrucosum Psidium roseum Psidium sabulosum Psidium chodatianum Psidium ellipticum Psidium atiraense Psidium cordillerense Psidium tomasense Psidium jakucsianum Psidium crispum Psidium glandulosum Psidium psychrophilum Psidium subcrenatum Psidium tomentosum Psidium gaudichaudianum Psidium grazielae Psidium ratterianum Psidium occidentale Psidium guayaquilense Psidium rotundidiscum Psidium sobralianum Psidium calptranthoides Psidium cymosum Psidium x hasslerianum Psidium globosum Psidium laruotteanum Psidium misionum Psidium nannophyllum Psidium lourteigiae Psidium loustalotii Psidium navasense Psidium pulverulentum Psidium raimondii Psidium rotundatum Psidium nummularia Psidium friedrichsthalianum