This section is from the book "Wild Flowers Of The North American Mountains", by Julia W. Henshaw. Also available from Amazon: Wild Flowers of the North American Mountains.
Herbs, shrubs or trees; leaves opposite, entire connected by interposed stipules or in whorls without apparent stipules; flowers perfect, regular, but often dimorphous; fruit dry or fleshy, separating into two carpels.
I. Galium. L.
1. G. boreale. L. Northern Bedstraw.
2. G. triflorum. Michx. Sweet-scented Bedstraw.
3. G. trifidum. L. Small Bedstraw.
Shrubs, vines or rarely herbs; leaves opposite; flowers mostly cymose and terminal, sometimes axillary, the calyx-tube adnate to the ovary, the corolla tubular or rotate; fruit a berry, drupe or pod.
I. Lonicera. L.
1. L. glaucescens. Rydb. Smooth-leaved Honeysuckle.
2. L. involucrata. (Richards.) Banks. Involucred Fly Honeysuckle.
3. L. utahensis. Wats. Bush Fly Honeysuckle. II. Symphoricarpus. (Dill.) Ludwig.
1. S. racemosus Michx. var. pauciflorus. Robbins. Snowberry.
III. Linnaeea. (Gronov.)
1. L. borealis L. var. americana. (Forbes.) Rehder. Northern Twin Flower.
IV. Viburnum. (Tourn.) L.
1. V. pauciflorum. Raf. Arrow-wood. V. Sambucus. (Tourn.) L.
1. S. racemosa. L. Red-berried Elder.
2. S. melanocarpa. Gray. Black-berried Elder.
Herbs with sometimes odorous and antispasmodic roots; leaves opposite, simple or divided, without stipules; flowers small, in panicles or dichotomous cymes, corolla tubular or funnel-form, often irregular, the lobes imbricated in the bud; fruit membranaceous or corriaceous, indehiscent.
I. Valeriana. (Tourn.) L.
1. V. septentrionalis. Northern Heliotrope.
2. V. sitchensis. Bong. Wild Heliotrope.
3. V. Scouleri. Rydb. Canada Heliotrope.
 
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