HYPERICACEAE (ST. JOHN'S-WORT FAMILY) 



3 STUARTI A STUARTIA. (S. pentdgyna*) 



2 HYPERICACEAE. St. Jo/m's-wort Family. 



1 SAR6THRA ORANGE-GRASS. (S. gentianoides.) 



2 TRIADENUM MARSH ST. JOHN'S-WORT. (T. virginicum.) 



3 ASCYRUM ST. ANDREW'S CROSS. (A. hypericotdes.) 



4 HYPERICUM. 



1 a Flowers ^4 in. or less broad, orange-yellow 2 



b Flowers more than a /4 in. broad, yellow 3 



2 a Leaves ovate to oblong, 5-veined at base 



SMALL-FLOWERED ST. JOHN'S-WORT. (H. mutilum.) 

 b Leaves linear, 3-veined at base 



CANADIAN ST. JOHN'S-WORT. (H. canadense.) 



3 a Average leaf H-% in. long; flowers %-i in. broad 



COMMON ST. JOHN'S-WORT. (H. perforation.) 

 b Average leaf 1-3 in. long 4 



4 a Flowers -2, in. broad; sepals ovate; ovary 3-loculed 



SPOTTED ST. JOHN'S-WORT. (H. maculatum.) 

 b Flowers 2-1 in. broad; sepals lanceolate; ovary i- 



loculed CREEPING ST. JOHN'S-WORT. (H. adpressum.) 



3 CISTACEAE. Rock-rose Family. 

 i HUDS6NIA. 



1 a Plant green; flowers on stalks about -2 in. long 



HEATH-LIKE HUDSONLA. (H. ericoldes.) 

 b Plant hoary with gray hairs; flowers nearly sessile 



WOOLLY HUDSONIA. (H. tomentbsa.) 



2 HELIANTHEMUM. 



1 a Plant cultivated in gardens. .ROCK-ROSE. (H. chamaecistus*) 

 b Plants not cultivated in gardens 2 



2 a Flowers 5-12 together in a terminal cluster 



HOARY FROSTWEED. (H. rnajits.) 

 b Flowers solitary or 2 together 



LONG-BRANCHED FROSTWEED. (H. canadense.) 



3 LfcCHEA. 



1 a Plant not very hairy; all leaves narrowly linear 



NARROW-LEAVED PIN-WEED. (L. tenuifblia.) 

 b Plants noticeably hairy; basal leaves oblong to ovate.. 2 



2 a Outer sepals shorter than the inner; plant branched at 



base BEECH PIN-WEED. (L. maritima.) 



b Outer sepals not shorter than the inner; plants branched 



only toward top 3 



3 a Outer sepals longer than the inner ; leaves % in. or less 



long THYME-LEAVED PIN-WEED. (L. minor.) 



b Outer sepals about equalling the inner; leaves % in. or 



more long HAIRY PIN-WEED. (L. villdsa.) 



4 TAMARICACEAE. Tamarix Family. 

 i TAMARIX FRENCH TAMARIX. (T. gdllica.*) 



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