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Jared A. Hoyle, J. Scott McElroy, and Elizabeth A. Guertal

Large crabgrass [ Digitaria sanguinalis (L.) Scop.] (Poaceae), Virginia buttonweed ( Diodia virginiana L.) (Rubiaceae), and cock’s-comb kyllinga ( Kyllinga squamulata Thonn. ex Vahl) (Cyperaceae) are common problematic weeds in turfgrass and crop

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Samantha R. Nobes, Karen L. Panter, and Randa Jabbour

in this study included ‘Princess Golden’ pot marigold ( Calendula officinalis ), ‘Lucinda Mix’ stock ( Matthiola incana ), ‘Double Mix’ strawflower ( Helichrysum bracteatum ), ‘Dara’ ornamental carrot ( Daucus carota ), and ‘Celway Mix’ cockscomb

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Sabine R. Green, Geno A. Picchioni, Leigh W. Murray, and Marisa M. Wall

thrives in warm weather ( Dole and Wilkins, 2005 ), and common globe amaranth is classified as heat tolerant ( Still, 1994 ). Also, several cultivars of common globe amaranth and cockscomb celosia withstand high levels of root zone salinity ( Carter et al

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Jeff A. Anderson

One method of plant freeze protection involves the application of compounds that promote freeze avoidance or tolerance. FreezePruf, a commercially available product recently marketed to improve both freeze avoidance and tolerance, contains polyethylene glycol, potassium silicate, glycerol, silicone polyether surfactant, and a bicyclic oxazolidine antidessicant. The goal of the present study was to evaluate the protection level provided by FreezePruf using laboratory-based methods involving plants and plant parts from species capable and incapable of low-temperature acclimation. FreezePruf did not lower the freezing temperature of pepper (Capsicum annuum) seedlings, celosia (Celosia argentea) seedlings, detached tomato (Solanum lycopersicum) leaves, or postharvest tomato fruit. Spray application of the putative cryoprotectant did not increase the freeze tolerance of bermudagrass (Cynodon dactylon) crowns or stolons. It is possible that a greater level of protection could be achieved with other species or different experimental protocols.

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W. Garrett Owen, Alyssa Hilligoss, and Roberto G. Lopez

counting individual cockscombs (celosia), flower buds showing visible color, open, and fully reflexed flowers (bellflower, dianthus, gomphrena, matricaria, and snapdragon), or calyces (bells of ireland). With the exception of celosia, flower length and

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increases in flowering stem length of both globe amaranth species and wheat celosia, and in flowering stem diameter of both globe amaranth species and cockscomb celosia were observed. Other measurable differences were number of stems harvested, flowering

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Paul R. Fantz, Dennis Carey, Tony Avent, and Jason Lattier

, veins 9–15, shorter scapes (17–29 cm) at maturity, peduncles 2–2.5x rachis length, rachis variation with occasional cockscombs, fasciation or lateral branching, longer bracts (3–5 mm, sometimes with elongated foliar bracts) and pedicels (3–5 mm), flower

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Paul R. Fantz

becoming purplish-brown/black to purple, 13 to 18 cm long, 3 to 6 mm wide; rachis 6 to 12 cm long, purplish, 3 to 4 mm wide, crowded, rarely branched, apex broad acute, occasionally expanding to form a cockscomb, or fasciated with short erect branches

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Yan-Ling Zheng and Huan-Cheng Ma

humidity (100%) for 3–7 d greatly increased seed germination percentage and germination speed in cockscomb ( Celosia argentea var. cristata ). However, cotton ( Gossypium hirsutum ) seed invigoration could not be achieved by humidification at 95% to 100

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Hiroaki Ito, Takahiro Hayashi, Masaki Hashimoto, Katsuro Miyagawa, Saori Nakamura, Youichi Mizuta, and Susumu Yazawa

) cockscomb ( Celosia cristata ), (I) bougainvillea ( Bougainvillea spectabilis ), (J) easter cactus ( Rhipsalidopsis gaertneri ), (K) portulaca ( Portulaca grandiflora ), (L) four o'clock ( Mirabilis jalapa ), (M) snapdragon ( Antirrhinum majus ), (N