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Key to CupressaceaeView taxon page for Cupressaceae
Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 1. Leaves alternate 1. Arranged singly, often spirally, along an axis - e.g., one leaf per node. 2. Occurring in different ranks, appearing to be between, not directly above or below, as 'stamens alternate petals'. , linear Elongate, with nearly parallel sides; narrower than elliptic or oblong. or awl-like 2. Leaves on sprouting, rapidly growing, or fertile stems awl-like, appressed Parallel or nearly parallel to and often in contact with surface of origin; used to describe the disposition of hairs, leaves, pedicels, etc. , not ranked, < 8 mm, on other stems linear (to lance-linear), spreading Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal. , ± 2-ranked, 5–25 mm; seed cone 13–35 mm ..... SEQUOIA 1' Leaves opposite 1. Arranged in pairs along an axis - e.g., two leaves per node. 2. Occurring in the same rank, directly above or below, as 'stamens opposite petals'. 3. Located directly across from. or whorled Arranged in groups of three or more at nodes or positions along an axis (e.g., three leaves per node). , scale-like to less often awl- or needle-like 3. Seed cone ± fleshy, berry-like, scales fused; seed wing 1. Thin, flat extension or appendage of a surface or margin. 2. In many members of Fabaceae and in some other groups, each of two lateral petals. 0; leaves whorled in 3s or not ..... JUNIPERUS 3' Seed cone woody, not berry-like, scales ± free; seed wing present, vestigial or not; leaves not whorled in 3s 4. Seed cone ± oblong Longer than wide, with nearly parallel sides; wider than linear. , scales not peltate With the stalk attached toward the middle, not at a margin, of a flat structure such as an indusium, scale, or leaf. , ± overlapping; seeds (1)2 per fertile scale 1. Wide, appressed, membranous, epidermal outgrowth (e.g., Cheilanthes covillei) 2. Structure partially or entirely covering an over-wintering bud (bud scale) (e.g., Salix goodingii bud). 3. In gymnosperms, a woody, seed-bearing structure attached to the cone axis (cone scale) (e.g., Abies magnifica). 4. In Asteraceae, a flat, membranous pappus element (e.g., Hymenoxys hoopesii). Leaves or bracts may be scale-like in one or more of the preceding ways. 5. Seed cone ± pendent, scales in 3 pairs, middle pair fertile; leaves opposite, appearing whorled in 4s, exposed part of each leaf Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets). longer than wide; seed wings unequal ..... CALOCEDRUS 5' Seed cone erect Upright; vertically oriented. to reflexed Abruptly bent or curved downward or backward. , scales in 4–6 pairs, middle 2–3 pairs fertile; leaves opposite, ± not appearing whorled in 4s; exposed part of each leaf ± as long as wide; seed wings ± equal ..... THUJA 4' Seed cone ± spheric to widely cylindric Elongate, with parallel sides and, at any point, round in transverse section. , scales peltate, abutting; seeds generally many per fertile scale 6. Seed cone maturing 1st year, scale projection generally present, <= 1 mm, base depressed Flattened from above and below, or with the center lower than the margins. from edge; leaves of 2 kinds ..... CHAMAECYPARIS 6' Seed cone maturing 2nd year, scale projection generally > 1 mm, especially 1st year, base level with or rising from edge; leaves of 1 kind (except Callitropsis) 7. Ultimate 3 orders of shoots in 2-dimensional, pendent clusters; seed cone opening, falling at maturity, scales generally 4–6 ..... CALLITROPSIS 7' Ultimate 3 orders of shoots in 3-dimensional, spreading clusters (except sometimes Hesperocyparis macnabiana); seed cone generally closed, falling many years after maturity, scales generally 6–12 ..... HESPEROCYPARIS
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Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
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