Page 16: 350 results for involucre
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Fagus grandifolia (American beech)
...of involucre straight to upcurved (vs. F. grandifolia, with leaf blades serrate, with 9-14 pairs of lateral veins, and prickles of carpellate involucre straight to recurved).: Fagus sylvat...
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Family: Asteraceae (aster family)
...an involucre. Individual flowers within the flower head may have pollen-bearing or ovule-bearing parts, or both. The sepals, attached near the summit of the ovary, frequently look like bristles or sca...
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Xanthium strumarium (rough cocklebur)
...carpellate involucres (17–) 20–40 mm long and 12–30 mm thick, terminated by 2 beaks 3–11 mm long; prickle bases of carpellate involucres spreading-pubescent and sometimes also stipitate-glandular [Fig...
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Quercus rubra (northern red oak)
...and involucre of nut (the "cap") covering 1/3 to 1/2 of the nut (vs. Q. rubra, with a terminal winter without hairs and circular in cross-section, and involucre of nut (the "cap") ...
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Symphyotrichum lanceolatum (lance-leaved American-aster)
...ditches. 1a. Involucres usually less than 4 mm tall; capitula crowded on the branches … 11a. S. lanceolatum ssp. lanceolatum var. interior (Wieg.) Nesom 1b. Involucres 4–6 mm tall; capitula more rem...
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Symphyotrichum racemosum (small white American-aster)
Symphyotrichum racemosum (Ell.) Nesom. small white American-aster. Non-Monocots Composites Facts About: Small white American-aster is sommetimes cultivated and sold commercially unde...
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Symphyotrichum ciliolatum (Lindley's American-aster)
Symphyotrichum ciliolatum (Lindl.) A. & D. Löve. Lindley's American-aster. Non-Monocots Composites Facts About: Lindley's American-aster is found in Massachusetts, Main...
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Sonchus arvensis (field sow-thistle)
...and involucres glabrous (though sometimes with sessile yellow glands on the involucre); longer involucral bracts 10–15 mm long … 1a. S. arvensis var. glabrescens Guent...
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Juncus pylaei (Pylaei's soft rush)
Juncus pylaei Laharpe. Pylaei's soft rush. Graminoids Remaining Graminoids Facts About: Pylaei's soft rush is often considered a variety of common soft rush (Juncus effusus...
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Trifolium: Dichotomous Key
...an involucre (i.e., a ring of fused bracts); plants perennial (annual in T. dalmaticum) 14a. Inflorescence subtended by an involucre; corolla 8–10 mm long, pink; plants annual ...