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An A5 booklet version as distributed in the - Hants Plants

An A5 booklet version as distributed in the - Hants Plants

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50<br />

Don’t show <strong>the</strong> plant <strong>in</strong> its natural sett<strong>in</strong>g.<br />

A critique of some illustrations<br />

We’ll take <strong>as</strong> an example two clovers that are small <strong>in</strong> stature, often grow toge<strong>the</strong>r,<br />

and can give beg<strong>in</strong>ners some problems. Actually <strong>the</strong>y separate out on a considerable<br />

number of mostly well-def<strong>in</strong>ed characters, all of which can be observed <strong>in</strong> <strong>the</strong> field, <strong>as</strong><br />

follows.<br />

Trifolium striatum (Knotted Clover) Trifolium scabrum (Rough Clover)<br />

Stems tend not to zigzag Stems tend to zigzag at le<strong>as</strong>t by fruit<strong>in</strong>g<br />

time<br />

Leaf ve<strong>in</strong>s tend to th<strong>in</strong> towards marg<strong>in</strong> of<br />

leaf, runn<strong>in</strong>g straight out<br />

Stipules end <strong>in</strong> a f<strong>in</strong>e bristly po<strong>in</strong>t<br />

(aristate)<br />

Calyx tends to be swollen nearer b<strong>as</strong>e<br />

(especially <strong>in</strong> fruit) or at le<strong>as</strong>t parallelsided<br />

Leaf ve<strong>in</strong>s rema<strong>in</strong> thick or even thicken<br />

towards marg<strong>in</strong> of leaf, bend<strong>in</strong>g<br />

backwards<br />

Stipules end <strong>in</strong> a concave-sided acute<br />

po<strong>in</strong>t (acum<strong>in</strong>ate)<br />

Calyx tends to be narrowly bell-shaped<br />

Calyx teeth spread little <strong>in</strong> fruit Calyx teeth tend to turn out or backward<br />

<strong>in</strong> fruit<br />

Corolla p<strong>in</strong>k Corolla white (very rarely p<strong>in</strong>k)<br />

Blamey, Fitter and Fitter (2003)<br />

These pictures don’t show <strong>the</strong> zigzag stem habit of Rough Clover at all. There is a<br />

detail illustration of <strong>the</strong> leaf ve<strong>in</strong>s for one species, but unfortunately no comparison<br />

for <strong>the</strong> o<strong>the</strong>r. Stipules don’t feature at all, and although <strong>the</strong> calyx of one is illustrated,<br />

<strong>the</strong>re is aga<strong>in</strong> no comparison and fruit<strong>in</strong>g specimens aren’t shown. The very vivid<br />

p<strong>in</strong>k colour shown for Knotted Clover, and <strong>the</strong> ra<strong>the</strong>r exaggerated size of <strong>the</strong> flower<br />

heads, could be mislead<strong>in</strong>g. Note that this illustration h<strong>as</strong> magnification <strong>in</strong>dicators for<br />

detail – less useful if <strong>the</strong> illustration is reproduced at a different scale.<br />

Epicormic shoots Shoots grow<strong>in</strong>g directly from <strong>the</strong> trunk of a tree<br />

Erect Upright<br />

Exserted Protrud<strong>in</strong>g<br />

F<strong>as</strong>cicle A close-set bundle or bunch<br />

Foliaceous Look<strong>in</strong>g like a leaf (when it isn’t)<br />

Free Not jo<strong>in</strong>ed to ano<strong>the</strong>r organ except at a s<strong>in</strong>gle po<strong>in</strong>t of attachment<br />

Gland A secret<strong>in</strong>g organ (it may be sunken, superficial, or stalked)<br />

Glandular Ei<strong>the</strong>r hav<strong>in</strong>g glands (e.g. “stems glandular”) or be<strong>in</strong>g a gland (e.g.<br />

“glandular hair”)<br />

Imbricate Overlapp<strong>in</strong>g<br />

Included Not protrud<strong>in</strong>g<br />

Indehiscent Not open<strong>in</strong>g or splitt<strong>in</strong>g by itself<br />

Internode The portion of stem between two adjacent<br />

nodes<br />

Latex Milky or rubbery sap<br />

Lax Loose, not dense<br />

Leaf-opposed Borne on <strong>the</strong> stem next to, but on <strong>the</strong> opposite side from, a leaf<br />

Ligule A strap-shaped structure; <strong>in</strong> particular, <strong>the</strong><br />

projection from <strong>the</strong> top of a leaf sheath <strong>in</strong><br />

Sedges (Cyperaceae) and Gr<strong>as</strong>ses<br />

(Poaceae). See also Flower parts and<br />

arrangements<br />

-merous (Comb<strong>in</strong>ed with a number suffix) composed of, or divided <strong>in</strong>to,<br />

several parts; e.g. trimerous, <strong>in</strong> 3 parts; pentamerous, <strong>in</strong> 5 parts.<br />

Monocarpic Flower<strong>in</strong>g and fruit<strong>in</strong>g once before dy<strong>in</strong>g<br />

Node A position on a stem where branches, leaves or flowers arise<br />

Ochrea A sheath formed by <strong>the</strong> fusion of two stipules<br />

Patent Spread<strong>in</strong>g roughly at right angles<br />

Pedicel; pedicellate Flower stalk; hav<strong>in</strong>g such a stalk<br />

Peduncle; pedunculate Stalk of an <strong>in</strong>florescence or group of two or more flowers; hav<strong>in</strong>g<br />

such a stalk<br />

Petiole; petiolate Leaf stalk; with a leaf stalk<br />

Petiolule Stalk of a leaflet <strong>in</strong> a compound leaf<br />

Proximal At or near <strong>the</strong> po<strong>in</strong>t of attachment<br />

Recurved Curved backwards<br />

Reflexed Bent abruptly backwards<br />

Revolute Rolled backwards<br />

Rhachis The stem form<strong>in</strong>g <strong>the</strong> axis of an <strong>in</strong>florescence or a compound leaf<br />

after <strong>the</strong> first branch<strong>in</strong>g, i.e. <strong>the</strong> portion above <strong>the</strong> peduncle or<br />

15

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