Byssoid

A growth form of a lichen thallus that is whispy, like teased wool. C   Dianthus chinensis has a caespitose growth habit   Callus tissue of Nicotiana tabacum growing on a nutrient medium in plant tissue culture   Structure of flower of an orchid in genus Praecoxanthus, with the callus labelled   Bearded callus of a floret of the grass species Chrysopogon filipes   Dormant leaf buds of deciduous trees are commonly protected by imbricate cataphylls that are shed when the bud sprouts   Male catkins of Betula pendula   The caudex of Dioscorea elephantipes grows largely above the soil surface. Many species that form caudices grow them underground.   Moehringia growing as a chasmophyte on an overhanging cliff   Chloroplasts within the cells of the leaves of the moss Bryum capillare   Not all chloroplasts are simple in shape. Chloroplasts of Spirogyra are helical within the tubular cells of their algal filaments.   Circinate vernation of crosiers of the fern Sadleria cyatheoides   The so-called "fleshy leaves" of cacti such as this Opuntia tomentosa are actually cladodes, branches. The true leaves are the spines growing on the cladodes, which on this young cladode are still fleshy.   Colony of cells forming a coenobium, of an alga in the genus Pediastrum   Asclepias syriaca seeds, showing the coma of hairs in its pappus   Curcuma pseudomontana with red coma bracts   Pfaffia gnaphalioides flowers with basal coma hairs   Coma atop Muscari armeniacum, bearing sterile flowers   The conical compound inflorescence of Aeonium arboreum is a compound panicle composed of minor panicles, some of which are compound in their turn   California buckeye (Aesculus californica) has a compound palmate leaf, the leaflets radiating from a central point   The lobes of the gamopetalous corolla of Nicotiana flowers are conduplicate in the bud   Casuarina equisetifolia male and female flowers and cones   Gamopetalous Watsonia flower split open between two petals to show the connate formation of the corolla tube; compare the adnate attachment of the stamen bases to the matching petals   Corms, one entire in its tunic, one partly peeled to show tunic cataphylls, and one split to show inner structure   The corona of this Passiflora flower is a ring of purple filaments between the petals and the stamens   Cotyledons of seedlings of Koelreuteria. One plant shows the first new leaves above its cotyledons; the rest show various younger stages of emerging cotyledons.   Crassula rupestris frequently grows as a cremnophyte on cliff faces in fynbos   Nymphoides crenata has crenate leaf margins   Crustose lichens on a wall   Mimetes cucullatus, so named for the hooded, cucullate shape of its white flowers   Murraya paniculata has leaves with cuneate (wedge-shaped) bases   Examples of cupules of Fagaceae: A: Quercus rubra B: Quercus trojana C: Fagus sylvatica D: Castanea sativa   Cuspidate leaves of Diplacus bigelovii var. cuspidatus   Euphorbia milii is commercially grown for the aesthetic appearance of its brightly colored, bract-like structures called cyathophylls, which sit below the inflorescence C, C−, C+In lichenology, "C" is an abbreviation for the test result of placing 5% solution of calcium hypochlorite or sodium hypochlorite (e.g. household bleach without additives) on the cortex or medulla of a lichen, to note the change in color, with no reaction noted as "C−", and production of a bright colour noted as "C+".

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